ColorPairLab

ColorPairLab provides free browser tools for text contrast, color conversion and palette building. Check a foreground and background pair, compare the contrast result for normal or large text, and preview adjustments. Convert HEX, RGB and HSL values, build palettes and review color pairs in a contrast matrix. No account is needed, and palette exports are local. Contrast results apply to opaque sRGB color pairs; they do not certify the accessibility of an entire website.