curl --request POST \
  --url https://api.iotools.cloud/v1/tool/accessible-color-pair-finder \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "foregroundColor": "#000000",
  "backgroundColor": "#FFFFFF"
}
'

{
  "tool": "accessible-color-pair-finder",
  "tool_version": "1.0.1",
  "outputs": {
    "contrastTable": [
      {
        "metric": "Contrast Ratio",
        "value": "21.00:1"
      },
      {
        "metric": "WCAG AA — Normal Text (≥ 4.5:1)",
        "value": "Pass"
      },
      {
        "metric": "WCAG AA — Large Text (≥ 3:1)",
        "value": "Pass"
      },
      {
        "metric": "WCAG AAA — Normal Text (≥ 7:1)",
        "value": "Pass"
      },
      {
        "metric": "WCAG AAA — Large Text (≥ 4.5:1)",
        "value": "Pass"
      },
      {
        "metric": "Foreground Relative Luminance",
        "value": "0.00000"
      },
      {
        "metric": "Background Relative Luminance",
        "value": "1.00000"
      }
    ],
    "suggestedForeground": "#000000"
  },
  "credits_used": 3,
  "credits_remaining": null
}