| Title | Sufficient contrast for foreground text and background image |
|---|---|
| Description | Document containing text on a background image specified via CSS. |
| Creator | BenToWeb (johannes.koch@…) |
| Rights | Copyright BenToWeb 2004-2007 |
| Language | English |
| Date | 2005-08-11 |
| Status | draft |
Technologies are markup languages or data formats. If the technology is a markup language, “features” refers to elements and attributes.
XHTML™ 1.0 The Extensible HyperText Markup Language (Second Edition)
The test is intended to fail because the luminosity contrast ratio is lower than 10. [@@lower than 7?]
The formula to be used for calculating the luminosity contrast ratio can be found at http://www.w3.org/TR/2007/WD-WCAG20-20070517/#contrast-ratiodef.
Accessibility expert.
“Rules” refer to success criteria in WCAG 2.0, checkpoints in WCAG 1.0 and similar requirements.
The test case fails the following success criterion at line 5, column 28: http://www.w3.org/TR/2007/WD-WCAG20-20070517/Overview.html#visual-audio-contrast-contrast.
The foreground and background colours don't have enough contrast.
The luminosity contrast ratio is 6.12.
This test case does not map to a WCAG 2.0 technique or failure.
The test case fails the following success criterion at line 5, column 28: http://www.w3.org/TR/2006/WD-WCAG20-20060427/guidelines.html#visual-audio-contrast-contrast.
The foreground and background colours don't have enough contrast.
Online version: sc1.4.3_l3_002.
The test case needs review before it can be established if it passes or fails the following success criterion: http://www.w3.org/TR/2006/WD-WCAG20-20050630/#visual-audio-contrast-contrast.
The WCAG WG hasn't provided threshold values for colour contrast yet.