curl --request POST \
  --url https://api.dirtroad.dev/tools/color-converter/hex-to-hsl \
  --header 'Content-Type: application/json' \
  --header 'X-Payment: <api-key>' \
  --data '
{
  "hex": "#FF0000"
}
'

{
  "original": "<string>",
  "result": {
    "h": 180,
    "s": 50,
    "l": 50
  }
}