color_contrast フィルター（2色間のコントラスト比を計算）

{
  "category": "color",
  "deprecated": false,
  "deprecation_reason": "",
  "description": "The order in which you specify the colors doesn't matter.\n\n> Tip:\n> For accessibility best practices, the\n> [WCAG 2.0 level AA](https://www.w3.org/WAI/WCAG21/quickref/?versions=2.0#qr-visual-audio-contrast-contrast) requires a\n> minimum contrast ratio of 4.5:1 for normal text, and 3:1 for large text. [Level AAA](https://www.w3.org/WAI/WCAG21/quickref/?versions=2.0#qr-visual-audio-contrast7)\n> requires a minimum contrast ratio of 7:1 for normal text, and 4.5:1 for large text.",
  "parameters": [
    {
      "description": "A color to compare with the provided color.",
      "name": "color",
      "positional": true,
      "required": true,
      "types": [
        "string"
      ]
    }
  ],
  "return_type": [
    {
      "type": "number",
      "name": "",
      "description": "",
      "array_value": ""
    }
  ],
  "examples": [
    {
      "name": "",
      "description": "",
      "syntax": "",
      "path": "/",
      "raw_liquid": "{{ '#E800B0' | color_contrast: '#D9D8FF' }}",
      "parameter": false,
      "display_type": "text",
      "show_data_tab": true
    }
  ],
  "summary": "Calculates the contrast ratio between two colors and returns the ratio's numerator. The ratio's denominator, which isn't\nreturned, is always 1. For example, with a contrast ratio of 3.5:1, this filter returns 3.5.",
  "syntax": "string | color_contrast: string",
  "name": "color_contrast"
}