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402utils Color Utilities
x402
402utils Color Utilities is a paid API for AI agents from 402utils.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Converts colors between formats, computes WCAG accessibility contrast ratios, and derives color palettes from a given color
Price / call$0.001
Success—
StatusUnknown
How this service works
Colour utilities: ?op=convert (default) turns any hex/rgb()/hsl()/CSS-name into hex, rgb, hsl, hsv, alpha, relative luminance and exact CSS name; ?op=contrast with ?fg=&bg= returns the WCAG 2.x contrast ratio and AA/AAA pass/fail for normal & large text plus UI components (accessibility / EAA); ?op=palette derives complementary, analogous, triadic, tints and shades. Send hex without '#'.
Output
Depending on the operation: (convert) hex, rgb, hsl, hsv, alpha, relative luminance (0-1), and exact CSS name if one exists; (contrast) WCAG contrast ratio (1-21), and AA/AAA pass/fail booleans for normal text, large text, and UI components; (palette) hex strings for complementary, analogous, triadic colors, plus arrays of tints and shades.
Example use cases
Example prompt
“Check if my text color #1a1a2e on background #f0f0f0 passes WCAG 2.x AA and AAA accessibility standards for both normal and large text, and also tell me the contrast ratio.”
Technical details
Endpoint
GEThttps://402utils.com/v1/colorWhen to prefer
Use this endpoint when you need color format conversion, WCAG accessibility contrast checking (AA/AAA compliance), or palette generation in a single lightweight paid API call. Prefer it over client-side libraries when you need a backend or agent-accessible computation, or when you want authoritative WCAG 2.x pass/fail verdicts including UI component thresholds. Well-suited for design tools, accessibility auditing, and automated UI checks.
Side effects
- Invalid or unrecognized color format returns an error
- Missing required color parameter returns an error
- Missing fg or bg when op=contrast returns an error
- Malformed hex string (e.g. including '#') may fail — hex must be sent without '#'
- Unsupported op value returns an error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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