curl --request POST \ --url https://api.iotools.cloud/v1/tool/color-contrast-grid \ --header 'Authorization: Bearer <token>' \ --header 'Content-Type: application/json' \ --data ' { "colors": "#000000\n#FFFFFF\n#808080" } '

{ "tool": "color-contrast-grid", "tool_version": "1.0.1", "outputs": { "contrastGrid": [ [ "", "#000000", "#ffffff", "#808080" ], [ "#000000", "1.00:1 ✗", "21.00:1 ✓", "5.32:1 ✓" ], [ "#ffffff", "21.00:1 ✓", "1.00:1 ✗", "3.95:1 ✗" ], [ "#808080", "5.32:1 ✓", "3.95:1 ✗", "1.00:1 ✗" ] ] }, "credits_used": 3, "credits_remaining": null }