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# Color API

3 endpoints — Same auth, same credit pool, same JSON envelope. Use them directly from apps, content sites, workflows, or agents without rebuilding formulas, validation, and docs for each tool.
[Start free →](/billing/checkout/?plan=free) [View OpenAPI](/v1/docs) [All categories](/tools/)
Accessibility
[
Color Contrast Checker color-contrast-checker
Check WCAG contrast ratio and AA/AAA compliance for two colors.
1cr · v2026-04-22
](/tools/color-contrast-checker/)
Conversion
[
Color Code Converter color-code-converter-all-formats
Convert HEX, RGB, HSL, HSV, CMYK, and common CSS named colors.
1cr · v2026-04-22
](/tools/color-code-converter-all-formats/)
Palette
[
Color Scheme Generator color-scheme-generator
Generate complementary, analogous, triadic, square, tetradic, and monochromatic palettes.
1cr · v2026-04-22
](/tools/color-scheme-generator/)
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