CONVERSION LOGIC
Check contrast between two colors
Calculate relative luminance for foreground and background and compare their contrast ratio.
Foreground + backgroundRatio + AA/AAA resultRuns locally
01Foreground + background
02Relative luminance → contrast ratio
03Ratio + AA/AAA result
Normal-text thresholds checked are 4.5:1 for AA and 7:1 for AAA.
The current pass/fail result is for normal text
Large-text and non-text accessibility criteria can use different WCAG requirements.
Your content stays in the browser
Processing runs locally in the page without requiring the content to be sent to UtilityLake.
02
In short
What exactly does it do?
Calculate relative luminance for foreground and background and compare their contrast ratio.
Example?
Normal-text thresholds checked are 4.5:1 for AA and 7:1 for AAA.