Name Your Own Color, Forever
OpenColors is the Global Color Registry. A computer can display 16.7 million RGB colors, but only about 30,000 have conventional names. Name an unnamed hex permanently for $1, or use the free tools and API.
Pick a color on the interactive 16.7 million color map, give it a unique name, and receive a digital certificate. The name is locked forever and returned by the OpenColors API to any app that looks up that hex.
The same site includes a brand color database, palette generator, product color visualizer, gradient gallery, WCAG contrast checker, colorblind simulations, and MCP tools for AI agents.
Read access is free and requires no API key. OpenColors is independent and is not affiliated with Pantone or RAL.
- Total RGB colors
- 16,777,216
- Cost to name a color
- $1 USD, once
- API
- Free REST + MCP, no key for reads
- Brand palettes
- 600+ official company hex sets
Frequently asked questions
What is OpenColors?
OpenColors is the Global Color Registry: a public database of all 16.7 million RGB colors. Anyone can name an unnamed hex code for $1, permanently. The registry, brand palettes, and developer API are free to read.
How many colors can be named?
There are 16,777,216 distinct 24-bit RGB colors (256³). About 30,000 colors have conventional names elsewhere. OpenColors lets the rest be named and looked up by hex or name.
How much does it cost to name a color?
One US dollar, once. There are no subscriptions or renewals. The name is locked forever and served through the free OpenColors API.
Is the OpenColors API free?
Yes. Read endpoints are public, require no API key, and return HEX, RGB, HSL, HSV, CMYK, WCAG contrast, and colorblind simulations. MCP tools are available for AI agents.
Is OpenColors affiliated with Pantone or RAL?
No. OpenColors is an independent public registry and is not affiliated with Pantone, RAL, or any proprietary color system.