Image dominant color

Extract the dominant colors of an image as a palette of hex values with pixel ratios. Send a public image URL or a base64 image, and optionally how many colors (1-10, default 5). Deterministic bucketed quantization; transparent pixels are ignored.

Input

Example output

{
  "width": 100,
  "height": 68,
  "sampled": 6240,
  "colors": [
    {
      "hex": "#181708",
      "rgb": [
        24,
        23,
        8
      ],
      "ratio": 0.078
    }
  ]
}

Try it — see the 402 challenge (free)

curl -i -X POST https://agent402.tools/api/image-dominant-color \
  -H "Content-Type: application/json" \
  -d '{"url":"https://raw.githubusercontent.com/ianare/exif-samples/master/jpg/Canon_40D.jpg","colors":3}'

The response is HTTP 402 Payment Required with exact payment requirements. Any x402 v2 client pays automatically and retries:

Paid call (JavaScript agent)

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client();
registerExactEvmScheme(client, { signer: privateKeyToAccount(KEY) });
const payFetch = wrapFetchWithPayment(fetch, client);

const res = await payFetch("https://agent402.tools/api/image-dominant-color", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "url": "https://raw.githubusercontent.com/ianare/exif-samples/master/jpg/Canon_40D.jpg",
    "colors": 3
  }),
});

Related tools