Convert a colour

$0.003 per call · failed calls are never charged · no account or API key needed

Convert a colour between hex, RGB and HSL, and give its relative luminance and whether black or white text reads better on it. Accepts #rgb, #rrggbb, rgb(r,g,b) and hsl(h,s%,l%). Use for theming and design checks.

Run it free (25 free calls) Buy credits by card (from $5) Example result (JSON)

Inputs

NameTypeDescription
color (required)stringThe colour

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/color?color=%230f6cbd"

Or one of your 25 free calls, no key:

curl "https://agent-data-tools.revmesh2074.workers.dev/color?color=%230f6cbd&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum, Monad, World Chain or Tempo) and retries.

Example result

{
  "hex": "#0f6cbd",
  "rgb": "rgb(15, 108, 189)",
  "hsl": "hsl(208, 85%, 40%)",
  "luminance": 0.141,
  "bestTextColor": "#ffffff"
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is color, and the first 25 successful calls are free:

https://agent-data-tools.revmesh2074.workers.dev/mcp

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