Templat:Color contrast ratio
 | Templat ini menggunakan Lua: |
This template returns the color contrast ratio between the two colors provided. It accepts two parameters, which can be a standard RGB hex color code (#RRGGBB) or a standard HTML color or CSS "orange" (= #FFA500). Color names and hex letters are case-insensitive (i.e. they may be upper- or lower-case).
Usage
[sunting sumber]Examples with light background
[sunting sumber]| Text Color | Background color | Sample | Code | Contrast ratio | WCAG 2.0 conf. |
|---|---|---|---|---|---|
| #000000 | #FFFFFF | Sample | {{Color contrast ratio|#000000|#FFFFFF}} |
21 | AAA |
| #000080 | #DDDDDD | Sample | {{Color contrast ratio|#000080|#DDDDDD}} |
11.787 | AAA |
| #7B0000 | #FF9900 | Sample | {{Color contrast ratio|#7B0000|#FF9900}} |
5.324 | AA |
| #004800 | #AAAAAA | Sample | {{Color contrast ratio|#004800|#AAAAAA}} |
4.691 | AA |
| red | white | Sample | {{Color contrast ratio|red|white}} |
3.998 | Tidak |
| #FF0000 | #FF9999 | Sample | {{Color contrast ratio|#FF0000|#FF9999}} |
1.955 | Tidak |
Examples with dark background
[sunting sumber]| Text Color | Background color | Sample | Code | Contrast ratio | WCAG 2.0 conf. |
|---|---|---|---|---|---|
| #BADFEE | black | Sample | {{Color contrast ratio|#BaDFeE|BlAcK}} |
14.878 | AAA |
| red | black | Sample | {{Color contrast ratio|red|black}} |
5.252 | AA |
| #FFFF00 | #00FFFF | Sample | {{Color contrast ratio|#FFFF00|#00FFFF}} |
1.168 | Tidak |
WCAG 2.0
[sunting sumber]As a guide to selecting foreground and background colors for text, the Web Content Accessibility Guidelines 2.0 (guideline 1.4) classifies contrast ratios for ordinary text as follows:
| Font size | Not Compliant | Level AA | Level AAA |
|---|---|---|---|
| Normal | < 4.5 | 4.5 to 7.0 | > 7.0 |
| Large (18 pt or 14 pt bold) | < 3.0 | 3.0 to 4.5 | > 4.5 |
Normal wiki-text is rendered by common browsers at roughly 9.5 to 10.5 pt (12.5 to 14 px), depending on skin. Text would need to be about 180% or 140% bold to qualify as "Large" for WCAG purposes.