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

The test is intended to pass because the luminosity contrast ratio is higher than 5.

The formula to be used for calculating the luminosity contrast ratio can be found in http://www.w3.org/TR/2006/WD-WCAG20-20060427/appendixA.html#luminosity-contrastdef.

oneExpert

The foreground and background colours have enough contrast.

The luminosity contrast ratio is 6.12.

This test case maps to technique G18: Ensuring that a contrast ratio of at least 5:1 exists between text and background behind the text

The foreground and background colours have enough contrast.

Online version: sc1.4.1_l2_002.

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