A free REST API, an npm CLI, a GitHub Action, an MCP server for AI editors, plus first-party Tailwind, CSS variables and W3C design-token exports.
Drop-in recipes for the most common color jobs.
Use ColorUI from anywhere - editor, CLI, CI, AI assistant or browser.
Convert any color to every format with one HTTP call. No account, no API key for normal use.
curl 'https://colorui.io/api/v1/convert?color=%237c5cff&format=all'
# {
# "input": "#7c5cff",
# "hex": "#7c5cff",
# "rgb": [124, 92, 255],
# "hsl": [251, 100, 68],
# "oklch": [0.65, 0.21, 290],
# ...
# }