| Title | Enough 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 2005-2007 |
| Language | English |
| Date | 2005-08-11 |
| Status | accepted QA |
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 5.
The formula to be used for calculating the luminosity contrast ratio can be found at http://www.w3.org/TR/2006/WD-WCAG20-20060427/appendixA.html#luminosity-contrastdef.
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 8, column 3: 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.
The luminosity contrast ratio is 4.35.
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.