Exact color conversion, accessible text colors, palettes, mixing, color-blindness simulation and contrast fixes.
payments ON MAINNET (real money) · 8 live endpoints
| Endpoint | Price | What it answers |
|---|---|---|
GET /accessible-text-color | $0.02 | Best text color (black or white) for a background hex color, with contrast ratios and WCAG AA/AAA results for both. |
GET /color-adjust | $0.02 | Lighten, darken, saturate, desaturate or rotate the hue of a hex color by an exact number of HSL points. |
GET /color-blind-sim | $0.02 | Simulate protanopia, deuteranopia and tritanopia on a color, or on a text/background pair with the contrast that remains. |
GET /color-convert | $0.02 | Convert a hex color to RGB, HSL, HSV and CMYK with CSS strings and relative luminance, exactly. |
GET /color-mix | $0.02 | Mix two hex colors at a ratio in sRGB or in linear light (physically correct), returning the blended hex. |
GET /contrast-fix | $0.02 | Adjust a text color's lightness just enough to reach a WCAG contrast target (4.5, 3 or 7) on a background, keeping its hue. |
GET /gradient-steps | $0.02 | Evenly spaced color steps between two hex colors, in sRGB or linear light, for charts, heatmaps and gradients. |
GET /palette-generate | $0.02 | Generate a color palette from a base hex color: complementary, analogous, triadic, tetradic, split-complementary or monochrome. |
GET /catalog returns this list as JSON. Activity hub · uptime.
Color results are computed locally from the values you supply with standard formulas (sRGB, WCAG 2.x, Machado 2009), provided as is. Color-blindness simulation approximates how colors may look and is not a substitute for testing with people. Every paid response carries a disclaimer field.