ColorUI is a free, no-sign-up color toolkit for designers and developers. Built by a small team of design-system engineers who got tired of bouncing between five different sites.
Every tool is a single page that loads in under a second. No accounts, no paywalls, no upsells.
WCAG 2.1 and APCA contrast checks live alongside every picker. Colorblindness simulation is one click away.
OKLCH, Display P3, and perceptually-uniform interpolation everywhere it matters - not just legacy sRGB.
No tracking pixels, no email walls. The whole site is built so a designer can land, work, and leave.
ColorUI is built and maintained by a small group of design-system engineers and front-end designers who use these tools every day. We ship updates often and read every piece of feedback.
Jump into the generator, the picker, or browse 30+ free tools.