About Colour Lab

Colour Lab was engineered to fix the slow, cluttered experience of traditional color conversion tools. Built on Next.js App Router and TypeScript, Colour Lab executes all color math directly in the browser with sub-millisecond performance and zero server delays.

Sub-Millisecond Speed

All HEX, RGB, HSL, HSV, and CMYK transformations run client-side. No network roundtrips or loading spinners.

WCAG Accessibility Standards

Integrated WCAG 2.1 relative luminance and contrast ratio calculators ensure your text passes AA and AAA standards.

Comprehensive Palette & Harmonies

Discover complementary, triadic, split-complementary, and monochromatic harmonies alongside 8-step shades, tints, and tones.

Developer Ready Export

Export clean CSS custom variables, inline styles, or Tailwind CSS v4 arbitrary utility classes with a single click.