curl --request POST \
  --url https://api.iotools.cloud/v1/tool/color-tint-shade-generator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "baseColor": "#808080",
  "steps": "5"
}
'

{
  "tool": "color-tint-shade-generator",
  "tool_version": "1.0.1",
  "outputs": {
    "tintShadeTable": [
      {
        "percentage": "17%",
        "tint-hex": "#969696",
        "shade-hex": "#6A6A6A"
      },
      {
        "percentage": "33%",
        "tint-hex": "#AAAAAA",
        "shade-hex": "#565656"
      },
      {
        "percentage": "50%",
        "tint-hex": "#C0C0C0",
        "shade-hex": "#404040"
      },
      {
        "percentage": "67%",
        "tint-hex": "#D5D5D5",
        "shade-hex": "#2A2A2A"
      },
      {
        "percentage": "83%",
        "tint-hex": "#E9E9E9",
        "shade-hex": "#161616"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}