About CS Color Palette
A small, focused set of free color tools for designers and developers.
What this site is
CS Color Palette is a set of static online color tools that help you do three things quickly: pick a color, build a palette, and convert between color formats. There is no account system and no data collection — the site does one job and gets out of the way.
Why everything runs locally
Every calculation on this site — HEX / RGB / HSL conversion, palette generation, contrast ratios — happens in your browser. No color value is uploaded, and images you drop in for color picking are read through a local canvas and never leave your device. That means:
- Your colors stay private — nothing is sent to a server.
- The pages load fast, because there is no backend round-trip.
- The tools keep working offline once the page has loaded.
How to get the most out of it
- Color picker — drag hue, saturation and lightness, type a hex value, or drop an image and sample a pixel.
- Palette generator — five lightness steps from one base color, exported as design tokens.
- Color wheel — complementary, analogous, triadic and tetradic schemes for a contrasting accent.
- Contrast checker — verify text pairs against WCAG AA and AAA before you ship.
- Converter — paste any notation and get the other two back instantly.
Feedback
If a tool behaves unexpectedly or you are missing something, feedback is welcome. This site is a pure utility: it provides the tools and does not offer registration.
Frequently asked questions
Do my colors get uploaded to a server?
No. Every color calculation — HEX / RGB / HSL conversion, palette generation, contrast ratios — runs locally in your browser; no value is ever sent to a server.
Are the tools free to use?
Completely free, with no sign-up and no login. Open a page and start working; leave whenever you like.
Which color formats can I convert?
HEX, RGB and HSL convert to each other both ways — paste any one notation and get the other two back instantly.
How do I contact you?
Email xlm8826@gmail.com for feedback and collaboration, or see antucao.com for more ways to reach us.