Everything here runs in your browser — nothing you type or upload is sent to a server. Pick a tool below to get started.
Pick any color and get its HEX, RGB, and HSL values instantly.
Turn one base color into a full analogous, complementary, or triadic palette.
Build a two-color CSS gradient and copy the code straight into your project.
Check background/text color pairs against WCAG AA and AAA accessibility standards.
Upload a photo and pull out its dominant colors for a moodboard or palette.
Type a HEX code and find the closest human-readable color name.
Most color tools ask you to upload files or create an account before you can get a simple HEX value or check a contrast ratio. Prism Kit skips that — every calculation, from color conversion to WCAG contrast scoring to extracting colors from a photo, happens using JavaScript running on your own device. Nothing is uploaded, logged, or stored on a server, which also means there's no waiting and no privacy trade-off.
We built this as a fast reference for the moments a design or development workflow needs a quick, accurate answer — not a full design suite. If you only need one thing, you shouldn't have to load one.
No. Every tool on Prism Kit works immediately with no sign-up, no email, and no usage limits.
Yes, all six tools are free with no paid tier. The site is supported by non-intrusive advertising.
If you need a quick HEX/RGB/HSL conversion, start with the Color Picker. If you're checking accessibility compliance, go straight to the Contrast Checker.