ColorContrastChecker

ColorContrastChecker helps you compare two colors against the WCAG 2.2 text contrast thresholds. Adjust foreground and background RGB sliders and see the contrast ratio, normal-text AA/AAA results, large-text AA/AAA results, and opaque color samples update immediately. Tap either RGB/HEX color panel to enter or copy #RRGGBB values, or use the photo icon to pick two pixels from a saved image or screenshot. Zoom and use the original-pixel magnifier to select solid areas. Image processing happens on your device; selected images and colors are not uploaded. Transparent pixels are composited on white and samples are converted to sRGB. When a combination falls short, preview a nearby foreground candidate for normal-text AA or AAA. Colors change only when you apply the candidate, and you can undo the suggestion. Results measure the two selected colors only. They do not certify an entire image, website, font size, or interface as WCAG conformant. Free to use, with banner advertising. No account or subscription required.