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Color Picker
Pick a colour with the swatch or type a hex code, and read it back as HEX, RGB, HSL and CMYK side by side. Your browser does every conversion.
ColorOpen Tool
Color Tools
Pick a colour and read it as HEX, RGB, HSL and CMYK, convert HEX to RGB and back, and check text/background contrast against WCAG AA and AAA.
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Quick answer
Pick a colour and read it as HEX, RGB, HSL and CMYK, convert between HEX and RGB, and test text against its background. The contrast checker uses the WCAG 2 ratios: 4.5:1 for normal text and 3:1 for large text at level AA.
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HEX to RGB Converter
Turn a hex color into its red, green and blue numbers and the CSS rgb() string, exactly.
ColorOpen Tool
RGB to HEX Converter
Pack red, green and blue numbers into the compact #RRGGBB hex code the web runs on.
ColorOpen Tool
Editor's Pick
Contrast Checker
Check whether your text and background colours have enough contrast to read, with a pass or fail at each WCAG accessibility level.
ColorOpen Tool
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About our Color Tools
These colour utilities are for designers and front-end developers. The picker shows every common format at once, the converters go from HEX to RGB and back exactly, and the contrast checker uses the WCAG 2 luminance formula to tell you whether text is readable.
You can use all 4 without an account. To jump to one, type part of its name in the filter box above.