Color tools
Small, fast color utilities. Same perceptual math we use to score the daily puzzle, exposed as standalone tools.
Color name finder
Bring a hex. Get the closest match from a curated pool of 6,177 named colors, ranked by CIEDE2000 perceptual distance. Source-attributed.
Delta-E calculator
Compute the perceptual color difference between two colors using the CIEDE2000 formula — the same scoring math Close Hue uses to grade your guesses.
Contrast checker
Measure the WCAG contrast ratio between a foreground and background color. Shows pass / fail for AA, AA Large, and AAA.
Color blindness simulator
Simulate how a color appears under protanopia, deuteranopia, tritanopia, and achromatopsia. Brettel/Viénot/Mollon methodology.
Palette generator
Five classical color-wheel schemes from one base color: complementary, analogous, triadic, split-complementary, and tetradic.
Shades & tints
Generate a tonal scale from one color: tints toward white, shades toward black. Interpolated in OKLab so the hue stays constant across the strip.
Color mixer
Blend two colors at any ratio. Side-by-side OKLab and RGB blends so you can see why perceptual mixing wins.
Hex / RGB / HSL / OKLCH converter
Convert a color between hex, RGB, HSL, and modern OKLCH representations. Paste in any format, copy out in any other format.