{"id":43400,"date":"2025-08-02T03:09:59","date_gmt":"2025-08-02T03:09:59","guid":{"rendered":"https:\/\/staging.pageloot.com\/uncategorized\/qr-code-color-contrast-best-practices\/"},"modified":"2026-10-23T06:01:13","modified_gmt":"2026-10-23T06:01:13","slug":"qr-code-color-contrast-best-practices","status":"publish","type":"post","link":"https:\/\/pageloot.com\/vi\/blog\/qr-code-color-contrast-best-practices\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn t\u01b0\u01a1ng ph\u1ea3n m\u00e0u m\u00e3 QR \u0111\u1ec3 qu\u00e9t \u1ed5n \u0111\u1ecbnh"},"content":{"rendered":"<p class=\"wp-block-paragraph\">M\u00e0u m\u00e3 QR t\u1ed1t nh\u1ea5t l\u00e0 c\u00e1c m\u00f4-\u0111un t\u1ed1i (c\u00e1c \u00f4 vu\u00f4ng) tr\u00ean n\u1ec1n s\u00e1ng, v\u00e0 \u0111\u00fang v\u1eady, m\u00e3 QR c\u00f3 th\u1ec3 c\u00f3 m\u00e0u. Quy t\u1eafc r\u1ea5t \u0111\u01a1n gi\u1ea3n: c\u00e1c m\u00f4-\u0111un ph\u1ea3i t\u1ed1i h\u01a1n r\u00f5 r\u1ec7t so v\u1edbi n\u1ec1n. M\u00e0u \u0111en tr\u00ean n\u1ec1n tr\u1eafng cho t\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n 21:1 v\u00e0 l\u00e0 l\u1ef1a ch\u1ecdn an to\u00e0n nh\u1ea5t. \u0110\u1ed1i v\u1edbi m\u00e3 c\u00f3 th\u01b0\u01a1ng hi\u1ec7u, h\u00e3y \u0111\u1eb7t m\u1ee5c ti\u00eau \u00edt nh\u1ea5t 4:1, v\u00e0 s\u1eed d\u1ee5ng 7:1 tr\u1edf l\u00ean cho bi\u1ec3n b\u00e1o ngo\u00e0i tr\u1eddi, n\u01a1i \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi v\u00e0 kho\u1ea3ng c\u00e1ch l\u00e0m gi\u1ea3m \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n hi\u1ec7u qu\u1ea3. H\u01b0\u1edbng d\u1eabn n\u00e0y cung c\u1ea5p c\u00e1c con s\u1ed1, b\u1ea3ng m\u00e0u v\u00e0 quy tr\u00ecnh ki\u1ec3m tra.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">M\u00e0u M\u00e3 QR n\u00e0o ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3, v\u00e0 M\u00e3 QR c\u00f3 th\u1ec3 c\u00f3 m\u00e0u kh\u00f4ng?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u00e3 QR c\u00f3 th\u1ec3 c\u00f3 h\u1ea7u h\u1ebft m\u1ecdi m\u00e0u, v\u00e0 n\u00f3 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e1c m\u00e0u kh\u00e1c nhau cho c\u00e1c m\u00f4-\u0111un v\u00e0 n\u1ec1n. Camera \u0111i\u1ec7n tho\u1ea1i kh\u00f4ng nh\u00ecn th\u1ea5y s\u1eafc \u0111\u1ed9. N\u00f3 chuy\u1ec3n \u0111\u1ed5i h\u00ecnh \u1ea3nh sang thang \u0111\u1ed9 x\u00e1m v\u00e0 quy\u1ebft \u0111\u1ecbnh, t\u1eebng \u00f4 vu\u00f4ng m\u1ed9t, \u0111\u00e2u l\u00e0 m\u00e0u t\u1ed1i v\u00e0 \u0111\u00e2u l\u00e0 m\u00e0u s\u00e1ng. V\u00ec v\u1eady, c\u00e2u h\u1ecfi kh\u00f4ng ph\u1ea3i l\u00e0 b\u1ea1n ch\u1ecdn m\u00e0u n\u00e0o, m\u00e0 l\u00e0 hai gi\u00e1 tr\u1ecb thang \u0111\u1ed9 x\u00e1m kh\u00e1c nhau \u0111\u1ebfn m\u1ee9c n\u00e0o.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3:<\/strong> c\u00e1c m\u00f4-\u0111un m\u00e0u xanh navy, xanh l\u00e1 c\u00e2y \u0111\u1eadm, than ch\u00ec, t\u00edm \u0111\u1eadm, n\u00e2u \u0111\u1eadm ho\u1eb7c \u0111en tr\u00ean n\u1ec1n tr\u1eafng, kem ho\u1eb7c m\u1ed9t n\u1ec1n r\u1ea5t s\u00e1ng kh\u00e1c.<\/li>\n<li><strong>Ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 khi c\u00f3 ki\u1ec3m tra:<\/strong> m\u00e0u \u0111\u1ecf \u0111\u1eadm, xanh m\u00f2ng k\u00e9t \u0111\u1eadm v\u00e0 cam \u0111\u1eadm tr\u00ean n\u1ec1n tr\u1eafng. Tr\u01b0\u1edbc ti\u00ean h\u00e3y ki\u1ec3m tra t\u1ef7 l\u1ec7 v\u00e0 qu\u00e9t m\u1ed9t b\u1ea3n in th\u1eed.<\/li>\n<li><strong>Kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3:<\/strong> c\u00e1c m\u00f4-\u0111un m\u00e0u v\u00e0ng, x\u00e1m nh\u1ea1t, pastel ho\u1eb7c neon, v\u00e0 b\u1ea5t k\u1ef3 c\u1eb7p m\u00e0u n\u00e0o c\u00f3 c\u00f9ng \u0111\u1ed9 s\u00e1ng, ch\u1eb3ng h\u1ea1n nh\u01b0 m\u00e0u xanh l\u00e1 c\u00e2y trung b\u00ecnh tr\u00ean m\u00e0u \u0111\u1ecf trung b\u00ecnh.<\/li>\n<li><strong>R\u1ee7i ro:<\/strong> c\u00e1c m\u00f4-\u0111un s\u00e1ng tr\u00ean n\u1ec1n t\u1ed1i (m\u00e3 \u0111\u1ea3o ng\u01b0\u1ee3c). Nhi\u1ec1u \u1ee9ng d\u1ee5ng qu\u00e9t c\u00f3 th\u1ec3 \u0111\u1ecdc ch\u00fang, nh\u01b0ng m\u1ed9t s\u1ed1 th\u00ec kh\u00f4ng, v\u00ec v\u1eady h\u00e3y tr\u00e1nh ch\u00fang tr\u00ean b\u1ea5t c\u1ee9 th\u1ee9 g\u00ec quan tr\u1ecdng.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">T\u1ea1i Sao \u0110\u1ed9 T\u01b0\u01a1ng Ph\u1ea3n Ki\u1ec3m So\u00e1t Kh\u1ea3 N\u0103ng Qu\u00e9t M\u00e3 QR<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c c\u1ea3m bi\u1ebfn quang h\u1ecdc \u0111\u1ecdc m\u00e3 QR b\u1eb1ng c\u00e1ch \u0111o s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 \u0111\u1ed9 ph\u1ea3n x\u1ea1 gi\u1eefa c\u00e1c m\u00f4-\u0111un t\u1ed1i v\u00e0 s\u00e1ng. Ti\u00eau chu\u1ea9n m\u00e3 QR, ISO\/IEC 18004, gi\u1ea3 \u0111\u1ecbnh c\u00e1c m\u00f4-\u0111un t\u1ed1i tr\u00ean n\u1ec1n s\u00e1ng. C\u00e1c m\u00f4-\u0111un t\u1ed1i h\u1ea5p th\u1ee5 \u00e1nh s\u00e1ng v\u00e0 n\u1ec1n s\u00e1ng ph\u1ea3n x\u1ea1 n\u00f3. N\u1ebfu s\u1ef1 kh\u00e1c bi\u1ec7t qu\u00e1 nh\u1ecf, b\u1ed9 gi\u1ea3i m\u00e3 kh\u00f4ng th\u1ec3 t\u00e1ch m\u1eabu d\u1eef li\u1ec7u kh\u1ecfi n\u1ec1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong th\u1eed nghi\u1ec7m m\u00e3 v\u1ea1ch (ISO\/IEC 15415), \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n k\u00fd hi\u1ec7u l\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa \u0111\u1ed9 ph\u1ea3n x\u1ea1 s\u00e1ng nh\u1ea5t v\u00e0 t\u1ed1i nh\u1ea5t trong m\u00e3. \u0110\u1ed9 t\u01b0\u01a1ng ph\u1ea3n k\u00fd hi\u1ec7u t\u1eeb 70% tr\u1edf l\u00ean \u0111\u1ea1t \u0111i\u1ec3m cao nh\u1ea5t, v\u00e0 d\u01b0\u1edbi 20% l\u00e0 th\u1ea5t b\u1ea1i. Ng\u01b0\u1eddi \u0111\u00e1nh gi\u00e1 c\u0169ng ki\u1ec3m tra \u0111i\u1ec1u bi\u1ebfn, cho th\u1ea5y c\u00e1c m\u00f4-\u0111un s\u00e1ng v\u00e0 t\u1ed1i ph\u1ea3n x\u1ea1 \u0111\u1ed3ng \u0111\u1ec1u nh\u01b0 th\u1ebf n\u00e0o tr\u00ean to\u00e0n b\u1ed9 k\u00fd hi\u1ec7u. M\u00e0u s\u1eafc kh\u00f4ng \u0111\u1ed3ng \u0111\u1ec1u ho\u1eb7c s\u1ef1 t\u00e1ch bi\u1ec7t y\u1ebfu khi\u1ebfn m\u00e1y qu\u00e9t b\u1ecf l\u1ee1 c\u00e1c c\u1ea1nh m\u00f4-\u0111un.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ph\u00e2n c\u1ef1c th\u00f4ng th\u01b0\u1eddng, v\u1edbi c\u00e1c m\u00f4-\u0111un t\u1ed1i tr\u00ean n\u1ec1n s\u00e1ng, ho\u1ea1t \u0111\u1ed9ng tr\u00ean m\u1ecdi thi\u1ebft b\u1ecb. M\u1ed9t s\u1ed1 \u1ee9ng d\u1ee5ng camera t\u00edch h\u1ee3p tr\u00ean \u0111i\u1ec7n tho\u1ea1i kh\u00f4ng th\u1ec3 \u0111\u1ecdc m\u00e3 s\u00e1ng tr\u00ean n\u1ec1n t\u1ed1i, v\u00e0 s\u1ef1 h\u1ed7 tr\u1ee3 kh\u00e1c nhau t\u00f9y theo m\u1eabu \u0111i\u1ec7n tho\u1ea1i v\u00e0 phi\u00ean b\u1ea3n ph\u1ea7n m\u1ec1m. H\u00e3y s\u1eed d\u1ee5ng ph\u00e2n c\u1ef1c th\u00f4ng th\u01b0\u1eddng tr\u1eeb khi b\u1ea1n \u0111\u00e3 th\u1eed nghi\u1ec7m phi\u00ean b\u1ea3n \u0111\u1ea3o ng\u01b0\u1ee3c tr\u00ean c\u00e1c thi\u1ebft b\u1ecb m\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a b\u1ea1n s\u1eed d\u1ee5ng.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u0110\u00e1nh gi\u00e1 T\u1ef7 l\u1ec7 v\u00e0 Ng\u01b0\u1ee1ng T\u01b0\u01a1ng ph\u1ea3n M\u00e0u s\u1eafc<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n l\u00e0 m\u1ed9t con s\u1ed1 t\u1eeb 1:1 (kh\u00f4ng c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t) \u0111\u1ebfn 21:1 (\u0111en tr\u00ean tr\u1eafng). T\u1ef7 l\u1ec7 n\u00e0y \u0111\u1ebfn t\u1eeb c\u00e1c quy t\u1eafc ti\u1ebfp c\u1eadn trong H\u01b0\u1edbng d\u1eabn Truy c\u1eadp N\u1ed9i dung Web (WCAG), v\u1ed1n \u0111\u01b0\u1ee3c vi\u1ebft cho v\u0103n b\u1ea3n nh\u01b0ng l\u00e0 m\u1ed9t c\u00e1ch th\u1ef1c t\u1ebf \u0111\u1ec3 ki\u1ec3m tra m\u00e0u s\u1eafc m\u00e3 QR. M\u1ed9t c\u00f4ng c\u1ee5 ki\u1ec3m tra \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n (t\u00ecm ki\u1ebfm \"WCAG contrast checker\") ch\u1ea5p nh\u1eadn hai m\u00e3 hex v\u00e0 tr\u1ea3 v\u1ec1 t\u1ef7 l\u1ec7. \u0110\u1ec3 bi\u1ebft th\u00eam v\u1ec1 thi\u1ebft k\u1ebf h\u00f2a nh\u1eadp, h\u00e3y \u0111\u1ecdc h\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/pageloot.com\/vi\/blog\/how-to-make-qr-codes-ada-compliant\/\">c\u00e1ch t\u1ea1o m\u00e3 QR tu\u00e2n th\u1ee7 ADA<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1eed d\u1ee5ng c\u00e1c m\u1ee5c ti\u00eau n\u00e0y. T\u1ed1i thi\u1ec3u 4:1 l\u00e0 m\u1ee9c t\u1ed1i thi\u1ec3u cho in \u1ea5n trong nh\u00e0 v\u00e0 m\u00e0n h\u00ecnh. 7:1 tr\u1edf l\u00ean an to\u00e0n h\u01a1n cho bao b\u00ec, t\u1edd r\u01a1i v\u00e0 b\u1ea5t c\u1ee9 th\u1ee9 g\u00ec \u0111\u01b0\u1ee3c ch\u1ee5p \u1ea3nh trong \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng kh\u00e1c nhau. 10:1 tr\u1edf l\u00ean l\u00e0 m\u1ee5c ti\u00eau cho b\u1ea3ng hi\u1ec7u ngo\u00e0i tr\u1eddi. C\u00e1c t\u1ef7 l\u1ec7 d\u01b0\u1edbi \u0111\u00e2y l\u00e0 g\u1ea7n \u0111\u00fang v\u00e0 ph\u1ee5 thu\u1ed9c v\u00e0o s\u1eafc th\u00e1i ch\u00ednh x\u00e1c.<\/p>\n\n\n\n<figure>\n<table>\n<thead>\n<tr>\n<th>K\u1ebft h\u1ee3p m\u00e0u s\u1eafc<\/th>\n<th>T\u1ef7 l\u1ec7 T\u01b0\u01a1ng ph\u1ea3n G\u1ea7n \u0111\u00fang<\/th>\n<th>\u0110\u00e1nh gi\u00e1 Kh\u1ea3 n\u0103ng Qu\u00e9t<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>\u0110en tr\u00ean Tr\u1eafng<\/td>\n<td>21:1<\/td>\n<td>T\u1ed1i \u01b0u (ti\u00eau chu\u1ea9n ng\u00e0nh)<\/td>\n<\/tr>\n<tr>\n<td>Xanh h\u1ea3i qu\u00e2n tr\u00ean m\u00e0u be<\/td>\n<td>~15:1<\/td>\n<td>Xu\u1ea5t s\u1eafc<\/td>\n<\/tr>\n<tr>\n<td>Xanh \u0111\u1eadm tr\u00ean v\u00e0ng nh\u1ea1t<\/td>\n<td>~12:1<\/td>\n<td>R\u1ea5t t\u1ed1t<\/td>\n<\/tr>\n<tr>\n<td>N\u00e2u \u0111\u1eadm tr\u00ean Tr\u1eafng ng\u00e0<\/td>\n<td>~8:1<\/td>\n<td>T\u1ed1t<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ecf thu\u1ea7n (#FF0000) tr\u00ean Tr\u1eafng<\/td>\n<td>~4:1<\/td>\n<td>G\u1ea7n gi\u1edbi h\u1ea1n, h\u00e3y ki\u1ec3m tra tr\u01b0\u1edbc khi in<\/td>\n<\/tr>\n<tr>\n<td>\u0110\u1ecf \u0111\u1eadm (#8B0000) tr\u00ean Tr\u1eafng<\/td>\n<td>~11:1<\/td>\n<td>R\u1ea5t t\u1ed1t<\/td>\n<\/tr>\n<tr>\n<td>X\u00e1m nh\u1ea1t tr\u00ean n\u1ec1n tr\u1eafng<\/td>\n<td>~1.5:1<\/td>\n<td>K\u00e9m (l\u1ed7i qu\u00e9t th\u01b0\u1eddng xuy\u00ean)<\/td>\n<\/tr>\n<tr>\n<td>V\u00e0ng tr\u00ean n\u1ec1n tr\u1eafng<\/td>\n<td>~1.1:1<\/td>\n<td>Kh\u00f4ng th\u1ec3 qu\u00e9t \u0111\u01b0\u1ee3c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/figure>\n\n\n\n<figure><img decoding=\"async\" src=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/09\/simple-infographic-in-square-format-on-white-background-with-black-text-blue-an-6224-c8dd242d8c58-aa97f1d94223.webp\" alt=\"H\u01b0\u1edbng d\u1eabn \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n m\u00e3 QR\" \/><\/figure>\n\n\n\n<blockquote class=\"is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>T\u00f9y ch\u1ec9nh m\u00e3 m\u00e0 kh\u00f4ng hy sinh kh\u1ea3 n\u0103ng qu\u00e9t<\/strong> Ki\u1ec3m tra m\u00e0u s\u1eafc v\u00e0 xem tr\u01b0\u1edbc thi\u1ebft k\u1ebf c\u1ee7a b\u1ea1n theo th\u1eddi gian th\u1ef1c b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng <a href=\"https:\/\/pageloot.com\/vi\/qr-code-generator-with-logo\/\">T\u1ea1o m\u00e3 QR c\u00f3 logo \u1edf gi\u1eefa<\/a> \u0111\u1ec3 c\u00e2n b\u1eb1ng t\u00ednh th\u1ea9m m\u1ef9 th\u01b0\u01a1ng hi\u1ec7u v\u1edbi kh\u1ea3 n\u0103ng qu\u00e9t \u0111\u00e1ng tin c\u1eady.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">T\u1ef7 l\u1ec7 T\u01b0\u01a1ng ph\u1ea3n M\u00e3 QR T\u1ed1t nh\u1ea5t cho B\u1ea3ng hi\u1ec7u Ngo\u00e0i tr\u1eddi<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00f4ng c\u00f3 ti\u00eau chu\u1ea9n n\u00e0o quy \u0111\u1ecbnh t\u1ef7 l\u1ec7 c\u1ea7n thi\u1ebft cho m\u00e3 QR ngo\u00e0i tr\u1eddi, nh\u01b0ng \u0111i\u1ec1u ki\u1ec7n ngo\u00e0i tr\u1eddi l\u00e0m gi\u1ea3m \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n theo ba c\u00e1ch: \u00e1nh n\u1eafng tr\u1ef1c ti\u1ebfp l\u00e0m m\u1edd c\u00e1c v\u00f9ng s\u00e1ng, \u00e1nh ch\u00f3i che khu\u1ea5t m\u1ed9t ph\u1ea7n m\u00e3 v\u00e0 kho\u1ea3ng c\u00e1ch l\u00e0m m\u1edd c\u00e1c m\u00f4-\u0111un nh\u1ecf. H\u00e3y l\u00ean k\u1ebf ho\u1ea1ch cho m\u1ed9t bi\u00ean \u0111\u1ed9 an to\u00e0n l\u1edbn h\u01a1n so v\u1edbi khi \u1edf trong nh\u00e0.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>S\u1eed d\u1ee5ng m\u00e0u \u0111en ho\u1eb7c m\u00e0u r\u1ea5t t\u1ed1i tr\u00ean n\u1ec1n tr\u1eafng. \u0110\u1eb7t m\u1ee5c ti\u00eau t\u1ef7 l\u1ec7 10:1 ho\u1eb7c cao h\u01a1n.<\/li>\n<li>In tr\u00ean v\u1eadt li\u1ec7u m\u1edd ho\u1eb7c th\u00eam l\u1edbp c\u00e1n m\u1edd. Nh\u1ef1a vinyl b\u00f3ng v\u00e0 k\u00ednh ph\u1ea3n chi\u1ebfu \u00e1nh n\u1eafng m\u1eb7t tr\u1eddi v\u00e0 l\u00e0m h\u1ecfng m\u1eabu.<\/li>\n<li>K\u00edch th\u01b0\u1edbc m\u00e3 ph\u00f9 h\u1ee3p v\u1edbi kho\u1ea3ng c\u00e1ch qu\u00e9t. M\u1ed9t quy t\u1eafc ph\u1ed5 bi\u1ebfn l\u00e0 1 \u0111\u01a1n v\u1ecb chi\u1ec1u r\u1ed9ng m\u00e3 cho m\u1ed7i 10 \u0111\u01a1n v\u1ecb kho\u1ea3ng c\u00e1ch, v\u00ec v\u1eady m\u00e3 \u0111\u01b0\u1ee3c qu\u00e9t t\u1eeb 2 m\u00e9t (kho\u1ea3ng 6,5 feet) n\u00ean r\u1ed9ng kho\u1ea3ng 20 cm (8 inch).<\/li>\n<li>Gi\u1eef to\u00e0n b\u1ed9 v\u00f9ng y\u00ean t\u0129nh v\u00e0 \u0111\u1eb7t m\u00e3 l\u00ean m\u1ed9t b\u1ea3ng m\u00e0u s\u00e1ng \u0111\u1ed3ng nh\u1ea5t thay v\u00ec m\u1ed9t b\u1ee9c \u1ea3nh.<\/li>\n<li>Tr\u00e1nh \u0111\u1eb7t m\u00e3 \u1edf n\u01a1i \u0111\u1ed1i di\u1ec7n v\u1edbi \u00e1nh n\u1eafng m\u1eb7t tr\u1eddi th\u1ea5p ho\u1eb7c ph\u00eda sau k\u00ednh, v\u00e0 qu\u00e9t bi\u1ec3n b\u00e1o \u0111\u00e3 in t\u1ea1i \u0111\u1ecba \u0111i\u1ec3m th\u1ef1c t\u1ebf tr\u01b0\u1edbc khi \u0111\u1eb7t in h\u00e0ng lo\u1ea1t.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u0110\u1ed9 T\u01b0\u01a1ng Ph\u1ea3n M\u00e3 V\u1ea1ch: M\u00e3 QR so v\u1edbi M\u00e3 V\u1ea1ch Tuy\u1ebfn T\u00ednh<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c quy t\u1eafc t\u01b0\u01a1ng ph\u1ea3n t\u01b0\u01a1ng t\u1ef1 \u00e1p d\u1ee5ng cho c\u00e1c m\u00e3 v\u1ea1ch c\u00f3 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n cao kh\u00e1c, nh\u01b0 Code 128 ho\u1eb7c EAN. M\u00e1y qu\u00e9t b\u00e1n l\u1ebb th\u01b0\u1eddng s\u1eed d\u1ee5ng tia laser \u0111\u1ecf, v\u00e0 \u00e1nh s\u00e1ng \u0111\u1ecf kh\u00f4ng nh\u00ecn th\u1ea5y c\u00e1c v\u1ea1ch \u0111\u1ecf ho\u1eb7c m\u1ef1c \u0111\u1ecf l\u00e0 m\u00e0u t\u1ed1i. \u0110\u1ed1i v\u1edbi m\u00e3 v\u1ea1ch tuy\u1ebfn t\u00ednh, h\u00e3y in c\u00e1c v\u1ea1ch m\u00e0u \u0111en, xanh \u0111\u1eadm ho\u1eb7c xanh l\u00e1 \u0111\u1eadm tr\u00ean n\u1ec1n tr\u1eafng, v\u00e0 kh\u00f4ng bao gi\u1edd in m\u00e0u \u0111\u1ecf ho\u1eb7c cam. M\u00e3 QR \u0111\u01b0\u1ee3c \u0111\u1ecdc b\u1eb1ng camera \u0111i\u1ec7n tho\u1ea1i \u00edt nh\u1ea1y c\u1ea3m v\u1edbi s\u1eafc \u0111\u1ed9 h\u01a1n, nh\u01b0ng c\u00f9ng l\u1eddi khuy\u00ean n\u00e0y mang l\u1ea1i k\u1ebft qu\u1ea3 \u0111\u00e1ng tin c\u1eady nh\u1ea5t cho c\u1ea3 hai.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">B\u1ea3o V\u1ec7 V\u00f9ng Y\u00ean T\u0129nh v\u00e0 K\u00edch Th\u01b0\u1edbc M\u00e3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed9 t\u01b0\u01a1ng ph\u1ea3n cao ph\u1ea3i k\u00e9o d\u00e0i \u0111\u1ebfn c\u1ea1nh c\u1ee7a m\u00e3. Ph\u1ea7n l\u1ec1 tr\u1ed1ng xung quanh m\u1eabu l\u00e0 v\u00f9ng y\u00ean t\u0129nh. N\u00f3 cho camera bi\u1ebft m\u00e3 b\u1eaft \u0111\u1ea7u t\u1eeb \u0111\u00e2u v\u00e0 c\u00e1c t\u00e1c ph\u1ea9m ngh\u1ec7 thu\u1eadt kh\u00e1c k\u1ebft th\u00fac \u1edf \u0111\u00e2u.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gi\u1eef m\u1ed9t v\u00f9ng y\u00ean t\u0129nh r\u1ed9ng \u00edt nh\u1ea5t b\u1ed1n chi\u1ec1u r\u1ed9ng m\u00f4-\u0111un \u1edf c\u1ea3 b\u1ed1n c\u1ea1nh.<\/li>\n<li>Gi\u1eef l\u1ec1 n\u00e0y kh\u00f4ng c\u00f3 v\u0103n b\u1ea3n, h\u00ecnh minh h\u1ecda v\u00e0 \u0111\u01b0\u1eddng vi\u1ec1n.<\/li>\n<li>Ph\u1ed1i v\u00f9ng y\u00ean t\u0129nh v\u1edbi m\u00e0u n\u1ec1n s\u00e1ng c\u1ee7a b\u1ea1n \u0111\u1ec3 \u0111\u01b0\u1eddng bi\u00ean r\u00f5 r\u00e0ng.<\/li>\n<li>In m\u00e3 \u00edt nh\u1ea5t 2 x 2 cm (0,8 x 0,8 inch) cho vi\u1ec7c qu\u00e9t c\u1ea7m tay \u1edf kho\u1ea3ng c\u00e1ch g\u1ea7n. In l\u1edbn h\u01a1n cho c\u00e1c li\u00ean k\u1ebft d\u00e0i h\u01a1n, v\u00ec nhi\u1ec1u d\u1eef li\u1ec7u h\u01a1n c\u00f3 ngh\u0129a l\u00e0 c\u00e1c m\u00f4-\u0111un nh\u1ecf h\u01a1n.<\/li>\n<li>\u01afu ti\u00ean m\u1ed9t li\u00ean k\u1ebft ng\u1eafn. M\u1ed9t URL ng\u1eafn t\u1ea1o ra m\u1ed9t m\u1eabu \u0111\u01a1n gi\u1ea3n h\u01a1n v\u1edbi c\u00e1c m\u00f4-\u0111un l\u1edbn h\u01a1n gi\u00fap qu\u00e9t t\u1ed1t h\u01a1n trong \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng y\u1ebfu.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">V\u0103n b\u1ea3n ho\u1eb7c h\u00ecnh \u1ea3nh b\u00ean trong v\u00f9ng t\u0129nh l\u00e0 nguy\u00ean nh\u00e2n th\u01b0\u1eddng g\u1eb7p g\u00e2y l\u1ed7i qu\u00e9t tr\u00ean c\u00e1c t\u00e0i li\u1ec7u c\u00f3 th\u01b0\u01a1ng hi\u1ec7u. H\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/pageloot.com\/vi\/blog\/best-practices-for-qr-code-readability\/\">c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hay nh\u1ea5t \u0111\u1ec3 \u0111\u1ecdc m\u00e3 QR<\/a> cho th\u1ea5y c\u00e1ch gi\u1eef c\u00e1c l\u1ec1 trong khi ph\u00f9 h\u1ee3p v\u1edbi b\u1ed1 c\u1ee5c c\u1ee7a b\u1ea1n.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Tr\u00e1nh nh\u1eefng l\u1ed7i ph\u1ed5 bi\u1ebfn v\u1ec1 m\u00e0u s\u1eafc v\u00e0 ki\u1ec3u d\u00e1ng<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00f9y ch\u1ec9nh m\u00e3 c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng \u0111\u1ecdc. Camera chuy\u1ec3n \u0111\u1ed5i h\u00ecnh \u1ea3nh sang thang \u0111\u1ed9 x\u00e1m, v\u00ec v\u1eady hai t\u00f4ng m\u00e0u kh\u00e1c nhau c\u00f3 th\u1ec3 c\u00f3 c\u00f9ng \u0111\u1ed9 s\u00e1ng v\u00e0 h\u1ee3p nh\u1ea5t th\u00e0nh m\u1ed9t m\u00e0u x\u00e1m.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tr\u00e1nh c\u00e1c m\u00f4-\u0111un m\u00e0u pastel nh\u01b0 xanh d\u01b0\u01a1ng nh\u1ea1t, xanh b\u1ea1c h\u00e0 ho\u1eb7c v\u00e0ng nh\u1ea1t.<\/li>\n<li>Tr\u00e1nh c\u00e1c m\u00f4-\u0111un m\u00e0u \u0111\u1ecf ho\u1eb7c cam s\u00e1ng. M\u00e1y qu\u00e9t laser \u0111\u1ecdc m\u00e0u \u0111\u1ecf l\u00e0 \u00e1nh s\u00e1ng, v\u00e0 t\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n th\u01b0\u1eddng d\u01b0\u1edbi 5:1. M\u1ed9t m\u00e0u \u0111\u1ecf s\u1eabm nh\u01b0 \u0111\u1ecf n\u00e2u s\u1ebd an to\u00e0n h\u01a1n nhi\u1ec1u.<\/li>\n<li>Tr\u00e1nh c\u00e1c gradient n\u01a1i ph\u1ea7n s\u00e1ng nh\u1ea5t c\u1ee7a m\u00e0u m\u00f4-\u0111un g\u1ea7n v\u1edbi n\u1ec1n.<\/li>\n<li>Tr\u00e1nh n\u1ec1n trong su\u1ed1t tr\u00ean \u1ea3nh, gi\u1ea5y c\u00f3 h\u1ecda ti\u1ebft ho\u1eb7c bao b\u00ec c\u00f3 hoa v\u0103n. \u0110\u1eb7t m\u00e3 l\u00ean m\u1ed9t b\u1ea3ng m\u00e0u s\u00e1ng \u0111\u1ed3ng nh\u1ea5t.<\/li>\n<li>Tr\u00e1nh c\u00e1c thi\u1ebft k\u1ebf \u0111\u1ea3o ng\u01b0\u1ee3c v\u1edbi c\u00e1c m\u00f4-\u0111un s\u00e1ng tr\u00ean n\u1ec1n t\u1ed1i tr\u1eeb khi b\u1ea1n \u0111\u00e3 ki\u1ec3m tra ch\u00fang tr\u00ean c\u00e1c \u0111i\u1ec7n tho\u1ea1i m\u00e0 \u0111\u1ed1i t\u01b0\u1ee3ng c\u1ee7a b\u1ea1n s\u1eed d\u1ee5ng.<\/li>\n<li>Tr\u00e1nh c\u00e1c logo l\u1edbn. M\u1ed9t logo che qu\u00e1 nhi\u1ec1u m\u00f4-\u0111un c\u00f3 th\u1ec3 v\u01b0\u1ee3t qu\u00e1 kh\u1ea3 n\u0103ng s\u1eeda l\u1ed7i c\u1ee7a m\u00e3.<\/li>\n<\/ul>\n\n\n\n<figure><img decoding=\"async\" src=\"https:\/\/pageloot.com\/wp-content\/uploads\/2026\/09\/simple-modern-illustration-square-format-white-background-with-blue-and-light-5434-1c9dea899260-7460e188a5de.webp\" alt=\"Quy t\u1eafc thi\u1ebft k\u1ebf m\u00e3 QR\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Bi\u1ebft nh\u1eefng gi\u1edbi h\u1ea1n n\u00e0y gi\u00fap b\u1ea1n h\u1ecdc \u0111\u01b0\u1ee3c <a href=\"https:\/\/pageloot.com\/vi\/how-to\/custom-qr-code\/\">c\u00e1ch t\u1ea1o m\u00e3 QR t\u00f9y ch\u1ec9nh<\/a> hi\u1ec3n th\u1ecb th\u01b0\u01a1ng hi\u1ec7u c\u1ee7a b\u1ea1n m\u00e0 kh\u00f4ng l\u00e0m h\u1ecfng qu\u00e1 tr\u00ecnh gi\u1ea3i m\u00e3.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ki\u1ec3m tra v\u00e0 x\u00e1c th\u1ef1c trong m\u00f4i tr\u01b0\u1eddng th\u1ef1c t\u1ebf<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">M\u1ed9t m\u00e3 c\u00f3 th\u1ec3 qu\u00e9t \u0111\u01b0\u1ee3c t\u1eeb m\u00e0n h\u00ecnh s\u00e1ng nh\u01b0ng c\u00f3 th\u1ec3 kh\u00f4ng qu\u00e9t \u0111\u01b0\u1ee3c tr\u00ean gi\u1ea5y. \u00c1nh s\u00e1ng ph\u00f2ng, g\u00f3c nh\u00ecn v\u00e0 k\u1ebft c\u1ea5u v\u1eadt li\u1ec7u \u0111\u1ec1u l\u00e0m thay \u0111\u1ed5i \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n \u0111\u1ebfn \u1ed1ng k\u00ednh. N\u1eafng tr\u1ef1c ti\u1ebfp l\u00e0m m\u1ea5t \u0111i s\u1ef1 kh\u00e1c bi\u1ec7t nh\u1ecf v\u1ec1 m\u00e0u s\u1eafc, ph\u00f2ng t\u1ed1i l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng c\u1ee7a c\u1ea3m bi\u1ebfn trong vi\u1ec7c ph\u00e2n t\u00e1ch c\u00e1c m\u00f4-\u0111un, v\u00e0 b\u1ec1 m\u1eb7t b\u00f3ng lo\u00e1ng th\u00eam \u0111\u1ed9 ch\u00f3i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ef1c hi\u1ec7n ki\u1ec3m tra n\u00e0y tr\u01b0\u1edbc m\u1ed7i l\u1ea7n in:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Ki\u1ec3m tra c\u1eb7p m\u00e0u trong tr\u00ecnh ki\u1ec3m tra \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n. T\u1ef7 l\u1ec7 ph\u1ea3i \u00edt nh\u1ea5t l\u00e0 4:1, v\u00e0 7:1 tr\u1edf l\u00ean \u0111\u1ed1i v\u1edbi bao b\u00ec v\u00e0 s\u1eed d\u1ee5ng ngo\u00e0i tr\u1eddi.<\/li>\n<li>In m\u1ed9t b\u1ea3n m\u1eabu tr\u00ean v\u1eadt li\u1ec7u th\u1eadt, v\u1edbi k\u00edch th\u01b0\u1edbc th\u1eadt, v\u1edbi ho\u00e0n thi\u1ec7n th\u1eadt.<\/li>\n<li>Qu\u00e9t n\u00f3 b\u1eb1ng camera t\u00edch h\u1ee3p tr\u00ean \u00edt nh\u1ea5t m\u1ed9t \u0111i\u1ec7n tho\u1ea1i iPhone v\u00e0 m\u1ed9t \u0111i\u1ec7n tho\u1ea1i Android, m\u1ed9t \u0111i\u1ec7n tho\u1ea1i c\u0169 h\u01a1n n\u1ebfu b\u1ea1n c\u00f3 th\u1ec3, v\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 d\u1ef1a tr\u00ean tr\u00ecnh duy\u1ec7t. <a href=\"https:\/\/pageloot.com\/vi\/qr-code-scanner\/\">Qu\u00e9t m\u00e3 QR<\/a>.<\/li>\n<li>Qu\u00e9t m\u00e3 trong \u0111i\u1ec1u ki\u1ec7n \u00e1nh s\u00e1ng t\u1ec7 nh\u1ea5t m\u00e0 m\u00e3 c\u00f3 th\u1ec3 g\u1eb7p: ph\u00f2ng t\u1ed1i, n\u1eafng tr\u1ef1c ti\u1ebfp v\u00e0 \u1edf m\u1ed9t g\u00f3c \u0111\u1ed9.<\/li>\n<li>N\u1ebfu m\u00e3 \u0111\u1ecdc ch\u1eadm ho\u1eb7c kh\u00f4ng qu\u00e9t \u0111\u01b0\u1ee3c, h\u00e3y t\u0103ng \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n, ph\u00f3ng to m\u00e3, r\u00fat ng\u1eafn li\u00ean k\u1ebft ho\u1eb7c kh\u00f4i ph\u1ee5c v\u00f9ng y\u00ean t\u0129nh.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">H\u01b0\u1edbng d\u1eabn c\u1ee7a ch\u00fang t\u00f4i v\u1ec1 <a href=\"https:\/\/pageloot.com\/vi\/how-to\/test-a-qr-code-before-printing\/\">c\u00e1ch ki\u1ec3m tra m\u00e3 QR tr\u01b0\u1edbc khi in<\/a> n\u00f3i chi ti\u1ebft h\u01a1n v\u1ec1 \u0111i\u1ec1u n\u00e0y, v\u00e0 <a href=\"https:\/\/pageloot.com\/vi\/blog\/how-to-improve-qr-code-readability\/\">c\u00e1ch c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng \u0111\u1ecdc m\u00e3 QR<\/a> \u0111\u1ec1 c\u1eadp \u0111\u1ebfn c\u00e1c c\u00e1ch kh\u1eafc ph\u1ee5c cho nh\u1eefng m\u00e3 kh\u00f4ng qu\u00e9t \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T\u1ed1i \u0111a h\u00f3a \u0111\u1ed9 tin c\u1eady v\u00e0 m\u1ee9c \u0111\u1ed9 t\u01b0\u01a1ng t\u00e1c c\u1ee7a m\u00e3 QR<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">H\u00e3y coi \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n l\u00e0 m\u1ed9t y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt, kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t b\u01b0\u1edbc ho\u00e0n thi\u1ec7n. Ch\u1ecdn m\u00e0u t\u1ed1i tr\u00ean n\u1ec1n s\u00e1ng, gi\u1eef v\u00f9ng y\u00ean t\u0129nh v\u00e0 ki\u1ec3m tra b\u1ea3n in th\u1eed d\u01b0\u1edbi \u00e1nh s\u00e1ng m\u00e0 m\u00e3 s\u1ebd g\u1eb7p ph\u1ea3i. \u0110i\u1ec1u \u0111\u00f3 gi\u00fap b\u1ea3o v\u1ec7 ng\u00e2n s\u00e1ch in c\u1ee7a b\u1ea1n kh\u1ecfi nh\u1eefng m\u00e3 kh\u00f4ng qu\u00e9t \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ea1o m\u00e3 c\u00f3 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n cao c\u1ee7a b\u1ea1n v\u1edbi <a href=\"https:\/\/pageloot.com\/vi\/qr-code-generator\/\">tr\u00ecnh t\u1ea1o m\u00e3 QR<\/a>. \u0110\u1eb7t m\u00e0u module v\u00e0 m\u00e0u n\u1ec1n, sau \u0111\u00f3 t\u1ea3i xu\u1ed1ng d\u01b0\u1edbi d\u1ea1ng PNG, SVG ho\u1eb7c PDF. N\u1ebfu b\u1ea1n in m\u1ed9t m\u00e3 v\u00e0 c\u00f3 th\u1ec3 c\u1ea7n thay \u0111\u1ed5i li\u00ean k\u1ebft sau n\u00e0y, h\u00e3y s\u1eed d\u1ee5ng m\u00e3 \u0111\u1ed9ng: b\u1ea1n c\u00f3 th\u1ec3 ch\u1ec9nh s\u1eeda \u0111\u00edch \u0111\u1ebfn sau khi in v\u00e0 xem s\u1ed1 li\u1ec7u th\u1ed1ng k\u00ea qu\u00e9t. M\u00e3 \u0111\u1ed9ng \u0111i k\u00e8m v\u1edbi b\u1ea3n d\u00f9ng th\u1eed mi\u1ec5n ph\u00ed 14 ng\u00e0y, v\u00e0 c\u00e1c g\u00f3i \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea t\u1ea1i <a href=\"https:\/\/pageloot.com\/vi\/pricing\/\">https:\/\/pageloot.com\/pricing\/<\/a>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/h2>\n\n\n\n<div class=\"schema-faq\"><div class=\"schema-faq-section\" id=\"faq-question-4d0961f21a19\"><strong class=\"schema-faq-question\">T\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n t\u1ed1i thi\u1ec3u \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb cho m\u00e3 QR l\u00e0 bao nhi\u00eau?<\/strong> <p class=\"schema-faq-answer\">\u0110\u1eb7t m\u1ee5c ti\u00eau t\u1ef7 l\u1ec7 \u00edt nh\u1ea5t 4:1 gi\u1eefa c\u00e1c m\u00f4-\u0111un v\u00e0 n\u1ec1n. S\u1eed d\u1ee5ng t\u1ef7 l\u1ec7 7:1 tr\u1edf l\u00ean cho bao b\u00ec v\u00e0 t\u1edd r\u01a1i, v\u00e0 10:1 tr\u1edf l\u00ean cho bi\u1ec3n hi\u1ec7u ngo\u00e0i tr\u1eddi. M\u00e0u \u0111en tr\u00ean n\u1ec1n tr\u1eafng l\u00e0 21:1.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-000000000001\"><strong class=\"schema-faq-question\">M\u00e3 QR c\u00f3 th\u1ec3 c\u00f3 m\u00e0u kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">C\u00f3. B\u1ea5t k\u1ef3 m\u00e0u n\u00e0o c\u0169ng \u0111\u01b0\u1ee3c n\u1ebfu c\u00e1c m\u00f4-\u0111un r\u00f5 r\u00e0ng t\u1ed1i h\u01a1n n\u1ec1n. M\u00e0u xanh h\u1ea3i qu\u00e2n \u0111\u1eadm, xanh l\u00e1 c\u00e2y r\u1eebng, than ch\u00ec v\u00e0 \u0111\u1ecf t\u00eda tr\u00ean n\u1ec1n tr\u1eafng ho\u1eb7c kem ho\u1ea1t \u0111\u1ed9ng t\u1ed1t. M\u00e0u v\u00e0ng, x\u00e1m nh\u1ea1t v\u00e0 m\u00e0u pastel th\u00ec kh\u00f4ng.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-000000000002\"><strong class=\"schema-faq-question\">M\u00e3 QR c\u00f3 th\u1ec3 c\u00f3 b\u1ea5t k\u1ef3 m\u00e0u n\u00e0o hay c\u00f3 nhi\u1ec1u m\u00e0u kh\u00e1c nhau kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">C\u00e1c m\u00f4-\u0111un v\u00e0 n\u1ec1n c\u00f3 th\u1ec3 c\u00f3 m\u00e0u s\u1eafc kh\u00e1c nhau, v\u00e0 b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng b\u1ea5t k\u1ef3 t\u00f4ng m\u00e0u n\u00e0o, nh\u01b0ng ch\u1ec9 s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 \u0111\u1ed9 s\u00e1ng m\u1edbi quan tr\u1ecdng. \u0110i\u1ec7n tho\u1ea1i \u0111\u1ecdc m\u00e3 \u1edf ch\u1ebf \u0111\u1ed9 thang \u0111\u1ed9 x\u00e1m, n\u00ean hai m\u00e0u c\u00f3 \u0111\u1ed9 s\u00e1ng b\u1eb1ng nhau s\u1ebd kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng. H\u00e3y ki\u1ec3m tra t\u1ef7 l\u1ec7 v\u00e0 qu\u00e9t b\u1ea3n in th\u1eed.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-000000000003\"><strong class=\"schema-faq-question\">T\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n m\u00e3 QR t\u1ed1t nh\u1ea5t cho bi\u1ec3n b\u00e1o ngo\u00e0i tr\u1eddi l\u00e0 g\u00ec?<\/strong> <p class=\"schema-faq-answer\">Kh\u00f4ng c\u00f3 ti\u00eau chu\u1ea9n ch\u00ednh th\u1ee9c. T\u1ef7 l\u1ec7 10:1 tr\u1edf l\u00ean l\u00e0 m\u1ee5c ti\u00eau an to\u00e0n, v\u00ed d\u1ee5 nh\u01b0 ch\u1eef \u0111en tr\u00ean n\u1ec1n tr\u1eafng. S\u1eed d\u1ee5ng l\u1edbp ho\u00e0n thi\u1ec7n m\u1edd \u0111\u1ec3 gi\u1ea3m \u0111\u1ed9 ch\u00f3i, \u0111\u1eb7t k\u00edch th\u01b0\u1edbc m\u00e3 kho\u1ea3ng 1\/10 kho\u1ea3ng c\u00e1ch qu\u00e9t v\u00e0 th\u1eed nghi\u1ec7m t\u1ea1i ch\u1ed7.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-eb66cabefb1b\"><strong class=\"schema-faq-question\">T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u00e0u s\u1eafc th\u01b0\u01a1ng hi\u1ec7u thay v\u00ec \u0111en tr\u1eafng \u0111\u01b0\u1ee3c kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">C\u00f3, n\u1ebfu m\u00e0u th\u01b0\u01a1ng hi\u1ec7u c\u1ee7a b\u1ea1n \u0111\u1ee7 t\u1ed1i, ch\u1eb3ng h\u1ea1n nh\u01b0 xanh navy \u0111\u1eadm, xanh l\u00e1 c\u00e2y r\u1eebng ho\u1eb7c than ch\u00ec, v\u00e0 n\u1eb1m tr\u00ean n\u1ec1n s\u00e1ng \u0111\u1ed3ng nh\u1ea5t. N\u1ebfu m\u00e0u th\u01b0\u01a1ng hi\u1ec7u c\u1ee7a b\u1ea1n nh\u1ea1t, h\u00e3y s\u1eed d\u1ee5ng m\u1ed9t s\u1eafc th\u00e1i t\u1ed1i c\u1ee7a n\u00f3 cho c\u00e1c m\u00f4-\u0111un.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-b3f945e26f6b\"><strong class=\"schema-faq-question\">T\u1ea1i sao camera \u0111i\u1ec7n tho\u1ea1i g\u1eb7p kh\u00f3 kh\u0103n v\u1edbi m\u00e3 QR \u0111\u1ea3o ng\u01b0\u1ee3c?<\/strong> <p class=\"schema-faq-answer\">Ti\u00eau chu\u1ea9n QR x\u00e1c \u0111\u1ecbnh c\u00e1c m\u00f4-\u0111un t\u1ed1i tr\u00ean n\u1ec1n s\u00e1ng. Nhi\u1ec1u \u1ee9ng d\u1ee5ng camera t\u00ecm ki\u1ebfm m\u1eabu \u0111\u00f3 tr\u01b0\u1edbc ti\u00ean, v\u00e0 m\u1ed9t s\u1ed1 kh\u00f4ng th\u1ec3 \u0111\u1ecdc c\u00e1c m\u00f4-\u0111un s\u00e1ng tr\u00ean n\u1ec1n t\u1ed1i. S\u1ef1 h\u1ed7 tr\u1ee3 kh\u00e1c nhau t\u00f9y theo \u0111i\u1ec7n tho\u1ea1i, v\u00ec v\u1eady h\u00e3y ki\u1ec3m tra tr\u01b0\u1edbc khi in.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-000000000006\"><strong class=\"schema-faq-question\">\u0110\u1ed9 t\u01b0\u01a1ng ph\u1ea3n c\u1ee7a m\u00e3 v\u1ea1ch c\u00f3 ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u1ef1 kh\u00f4ng?<\/strong> <p class=\"schema-faq-answer\">C\u00f3. M\u00e3 v\u1ea1ch tuy\u1ebfn t\u00ednh nh\u01b0 Code 128 ho\u1eb7c EAN c\u0169ng c\u1ea7n c\u00e1c v\u1ea1ch t\u1ed1i tr\u00ean n\u1ec1n s\u00e1ng. M\u00e1y qu\u00e9t laser b\u00e1n l\u1ebb s\u1eed d\u1ee5ng \u00e1nh s\u00e1ng \u0111\u1ecf, v\u00ec v\u1eady kh\u00f4ng bao gi\u1edd in c\u00e1c v\u1ea1ch m\u00e0u \u0111\u1ecf ho\u1eb7c cam.<\/p> <\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>T\u00ecm hi\u1ec3u c\u00e1c nguy\u00ean t\u1eafc ch\u00ednh v\u1ec1 \u0111\u1ed9 t\u01b0\u01a1ng ph\u1ea3n m\u00e0u c\u1ee7a m\u00e3 QR, t\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb v\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p ki\u1ec3m tra \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u00e3 c\u1ee7a b\u1ea1n c\u00f3 th\u1ec3 qu\u00e9t \u0111\u01b0\u1ee3c m\u1ed9t c\u00e1ch \u0111\u00e1ng tin c\u1eady tr\u00ean m\u1ecdi \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh.<\/p>","protected":false},"author":17,"featured_media":56404,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[2635],"tags":[],"class_list":["post-43400","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>QR Code Colors: Best Contrast Ratios and Combos<\/title>\n<meta name=\"description\" content=\"Which QR code colors scan? Learn the contrast ratios, safe color combinations and a test routine so a branded code works on print and screens.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/pageloot.com\/vi\/blog\/qr-code-color-contrast-best-practices\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"QR Code Colors: Best Contrast Ratios and Combos\" \/>\n<meta property=\"og:description\" content=\"Which QR code colors scan? 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V\u1edbi chuy\u00ean m\u00f4n s\u00e2u s\u1eafc k\u00e9o d\u00e0i h\u01a1n 5 n\u0103m ch\u1ec9 v\u1ec1 m\u00e3 QR, Siim \u0111\u00e3 tr\u1edf th\u00e0nh m\u1ed9t chuy\u00ean gia v\u1ec1 ch\u1ee7 \u0111\u1ec1 n\u00e0y trong l\u0129nh v\u1ef1c n\u00e0y. Anh \u1ea5y \u0111\u00e3 c\u00f3 nh\u1eefng b\u01b0\u1edbc ti\u1ebfn \u0111\u00e1ng k\u1ec3 trong vi\u1ec7c t\u1eadn d\u1ee5ng c\u00f4ng ngh\u1ec7 QR \u0111\u1ec3 \u0111\u01a1n gi\u1ea3n h\u00f3a v\u00e0 t\u0103ng c\u01b0\u1eddng c\u00e1c t\u01b0\u01a1ng t\u00e1c k\u1ef9 thu\u1eadt s\u1ed1. Cu\u1ed9c h\u00e0nh tr\u00ecnh c\u1ee7a anh kh\u00f4ng ch\u1ec9 b\u1eaft \u0111\u1ea7u \u1edf \u0111\u00e2y. Siim c\u00f3 n\u1ec1n t\u1ea3ng k\u1ef9 thu\u1eadt s\u1ed1 s\u00e2u r\u1ed9ng v\u1edbi h\u01a1n 10 n\u0103m kinh nghi\u1ec7m v\u1eefng ch\u1eafc trong l\u0129nh v\u1ef1c Ph\u1ea7n m\u1ec1m d\u01b0\u1edbi d\u1ea1ng d\u1ecbch v\u1ee5 (SaaS), m\u1ed9t minh ch\u1ee9ng cho ki\u1ebfn th\u1ee9c s\u00e2u r\u1ed9ng c\u1ee7a \u00f4ng v\u1ec1 c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt s\u1ed1.","sameAs":["https:\/\/www.linkedin.com\/in\/siim-tiigimagi\/"]},{"@type":"Question","@id":"https:\/\/pageloot.com\/blog\/qr-code-color-contrast-best-practices\/#faq-question-4d0961f21a19","position":1,"url":"https:\/\/pageloot.com\/blog\/qr-code-color-contrast-best-practices\/#faq-question-4d0961f21a19","name":"T\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n t\u1ed1i thi\u1ec3u \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb cho m\u00e3 QR l\u00e0 bao nhi\u00eau?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Aim for at least 4:1 between the modules and the background. Use 7:1 or more for packaging and flyers, and 10:1 or more for outdoor signage. Black on white is 21:1.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/blog\/qr-code-color-contrast-best-practices\/#faq-question-000000000001","position":2,"url":"https:\/\/pageloot.com\/blog\/qr-code-color-contrast-best-practices\/#faq-question-000000000001","name":"M\u00e3 QR c\u00f3 th\u1ec3 c\u00f3 m\u00e0u kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes. Any color works if the modules are clearly darker than the background. Deep navy, forest green, charcoal and maroon on white or cream work well. Yellow, light gray and pastels do not.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/blog\/qr-code-color-contrast-best-practices\/#faq-question-000000000002","position":3,"url":"https:\/\/pageloot.com\/blog\/qr-code-color-contrast-best-practices\/#faq-question-000000000002","name":"M\u00e3 QR c\u00f3 th\u1ec3 c\u00f3 b\u1ea5t k\u1ef3 m\u00e0u n\u00e0o hay c\u00f3 nhi\u1ec1u m\u00e0u kh\u00e1c nhau kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The modules and the background can be different colors, and you can use any hue, but only the brightness difference matters. A phone reads the code in grayscale, so two colors of equal brightness will fail. Check the ratio and scan a printed proof.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/blog\/qr-code-color-contrast-best-practices\/#faq-question-000000000003","position":4,"url":"https:\/\/pageloot.com\/blog\/qr-code-color-contrast-best-practices\/#faq-question-000000000003","name":"T\u1ef7 l\u1ec7 t\u01b0\u01a1ng ph\u1ea3n m\u00e3 QR t\u1ed1t nh\u1ea5t cho bi\u1ec3n b\u00e1o ngo\u00e0i tr\u1eddi l\u00e0 g\u00ec?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"There is no official standard. A ratio of 10:1 or higher is a safe target, such as black on white. Use a matte finish to cut glare, size the code at about 1\/10 of the scan distance, and test it on site.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/blog\/qr-code-color-contrast-best-practices\/#faq-question-eb66cabefb1b","position":5,"url":"https:\/\/pageloot.com\/blog\/qr-code-color-contrast-best-practices\/#faq-question-eb66cabefb1b","name":"T\u00f4i c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u00e0u s\u1eafc th\u01b0\u01a1ng hi\u1ec7u thay v\u00ec \u0111en tr\u1eafng \u0111\u01b0\u1ee3c kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes, if your brand color is dark enough, such as deep navy, forest green or charcoal, and sits on a uniform light background. If your brand color is light, use a dark shade of it for the modules.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/blog\/qr-code-color-contrast-best-practices\/#faq-question-b3f945e26f6b","position":6,"url":"https:\/\/pageloot.com\/blog\/qr-code-color-contrast-best-practices\/#faq-question-b3f945e26f6b","name":"T\u1ea1i sao camera \u0111i\u1ec7n tho\u1ea1i g\u1eb7p kh\u00f3 kh\u0103n v\u1edbi m\u00e3 QR \u0111\u1ea3o ng\u01b0\u1ee3c?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"The QR standard defines dark modules on a light background. Many camera apps look for that pattern first, and some cannot read light modules on a dark background. Support varies by phone, so test before you print.","inLanguage":"vi"},"inLanguage":"vi"},{"@type":"Question","@id":"https:\/\/pageloot.com\/blog\/qr-code-color-contrast-best-practices\/#faq-question-000000000006","position":7,"url":"https:\/\/pageloot.com\/blog\/qr-code-color-contrast-best-practices\/#faq-question-000000000006","name":"\u0110\u1ed9 t\u01b0\u01a1ng ph\u1ea3n c\u1ee7a m\u00e3 v\u1ea1ch c\u00f3 ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u1ef1 kh\u00f4ng?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes. Linear barcodes such as Code 128 or EAN also need dark bars on a light background. Retail laser scanners use red light, so never print the bars in red or orange.","inLanguage":"vi"},"inLanguage":"vi"}]}},"_links":{"self":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/43400","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/comments?post=43400"}],"version-history":[{"count":10,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/43400\/revisions"}],"predecessor-version":[{"id":56958,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/posts\/43400\/revisions\/56958"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/media\/56404"}],"wp:attachment":[{"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/media?parent=43400"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/categories?post=43400"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pageloot.com\/vi\/wp-json\/wp\/v2\/tags?post=43400"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}