Document containing text on a background image specified via CSS. Sufficient contrast for foreground text and background image johannes.koch@fit.fraunhofer.de en Copyright BenToWeb 2004-2007 2005-08-11 validated

The test is intended to pass because the contrast ratio is higher than 7:1.

The formula to be used for calculating the contrast ratio can be found at http://www.w3.org/TR/2007/WD-WCAG20-20070517/#contrast-ratiodef.

 oneExpert

The foreground and background colours have sufficient contrast.

The contrast ratio is 11.20:1.

This test case maps to technique G17: Ensuring that a contrast ratio of at least 7:1 exists between text and background behind the text.

The foreground and background colours have enough contrast.

Online version: sc1.4.3_l3_001.

The WCAG WG hasn't provided threshold values for colour contrast yet.