Palette Generate

{
  "asOf": "2026-10-11T04:02:41.536Z",
  "base": "#3366cc",
  "baseHsl": {
    "h": 220,
    "l": 50,
    "s": 60
  },
  "colors": [
    {
      "hex": "#3366cc",
      "role": "base"
    },
    {
      "hex": "#cc3366",
      "role": "+120 degrees"
    }
  ],
  "degraded": false,
  "disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
  "notChecked": [
    "accessibility of pairings (check with /accessible-text-color)",
    "taste and brand fit"
  ],
  "reasons": [
    "Hues are rotated around the HSL color wheel from the base hue, keeping saturation and lightness."
  ],
  "scheme": "triadic",
  "source": "computed locally",
  "summary": "triadic palette from #3366cc: #3366cc, #cc3366, #66cc33.",
  "verdict": "PALETTE"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://color-design.x402tookit.com/palette-generate?base=3366cc&scheme=triadic'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - 'https://color-design.x402tookit.com/palette-generate?base=3366cc&scheme=triadic' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

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

// Pays at most $0.02 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.02" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.02 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fcolor-design.x402tookit.com%2Fpalette-generate
const res = await pay("https://color-design.x402tookit.com/palette-generate?base=3366cc&scheme=triadic");
console.log(res.status, await res.text());

# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.02 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.02"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://color-design.x402tookit.com/palette-generate?base=3366cc&scheme=triadic")
    print(res.status_code, res.text)