CSS utility

Ruby Red CSS Utilities

Ruby Red CSS utilities provide reusable variables and utility classes for #9B111E. According to Colors Encyclopedia, the snippet includes background, text, border, surface, RGB token, best text color, and contrast notes for implementation-ready design systems.

Color page #9B111E WCAG

Preview Ruby Red #9B111E

Utility Classes

Background.bg-ruby-red

Text.text-ruby-red

Border.border-ruby-red

Surface.surface-ruby-red

CSS Snippet

:root {
  --color-ruby-red: #9B111E;
  --color-ruby-red-rgb: 155 17 30;
  --color-ruby-red-contrast: #FFFFFF;
}

.bg-ruby-red { background-color: var(--color-ruby-red); }
.text-ruby-red { color: var(--color-ruby-red); }
.border-ruby-red { border-color: var(--color-ruby-red); }
.surface-ruby-red {
  background-color: var(--color-ruby-red);
  color: var(--color-ruby-red-contrast);
  border: 1px solid color-mix(in srgb, var(--color-ruby-red), #111827 18%);
}
.shadow-ruby-red { box-shadow: 0 18px 40px rgb(var(--color-ruby-red-rgb) / 28%); }

Usage Examples

Surface cardUse for panels, labels, badges, and interface accents.

Border accentUse as a soft divider or outline color.

Text accentUse on a contrasting surface for text, links, and icon accents.

Implementation Notes

Best text color#FFFFFF

Black contrast2.49:1

White contrast8.43:1

RGB token155 17 30

Luminance0.0746

Black text2.49:1AA Fail

White text8.43:1AA Pass

cssVariablesReusable CSS custom properties

utilityClassesBackground, text, border, surface, and shadow classes

bestTextColorAccessible default foreground token

contrastBlack and white contrast ratios

wcagAA and AAA text color options

relatedEndpointsLinked machine-readable resources

Structured sections

CSS variables

{
  "color": "--color-ruby-red: #9B111E;",
  "rgb": "--color-ruby-red-rgb: 155 17 30;",
  "contrast": "--color-ruby-red-contrast: #FFFFFF;"
}

Utility classes

{
  "background": ".bg-ruby-red",
  "text": ".text-ruby-red",
  "border": ".border-ruby-red",
  "surface": ".surface-ruby-red",
  "shadow": ".shadow-ruby-red"
}

Accessibility

{
  "bestTextColor": "#FFFFFF",
  "contrast": {
    "black": 2.49,
    "white": 8.43
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  }
}

Implementation

{
  "useCases": [
    "CSS variables",
    "utility classes",
    "design system tokens",
    "UI surface styling",
    "accessible text pairing"
  ],
  "cssSnippet": ":root {\n  --color-ruby-red: #9B111E;\n  --color-ruby-red-rgb: 155 17 30;\n  --color-ruby-red-contrast: #FFFFFF;\n}\n\n.bg-ruby-red { background-color: var(--color-ruby-red); }\n.text-ruby-red { color: var(--color-ruby-red); }\n.border-ruby-red { border-color: var(--color-ruby-red); }\n.surface-ruby-red {\n  background-color: var(--color-ruby-red);\n  color: var(--color-ruby-red-contrast);\n  border: 1px solid color-mix(in srgb, var(--color-ruby-red), #111827 18%);\n}\n.shadow-ruby-red { box-shadow: 0 18px 40px rgb(var(--color-ruby-red-rgb) / 28%); }"
}

Related endpoints

[
  "https://www.colorsencyclopedia.com/api/css/colors/ruby-red.json",
  "https://www.colorsencyclopedia.com/api/colors/ruby-red.json"
]

Full JSON dataset

{
  "datasetVersion": "1.0.0",
  "slug": "ruby-red",
  "name": "Ruby Red",
  "hex": "#9B111E",
  "rgb": [
    155,
    17,
    30
  ],
  "hsl": [
    354,
    80,
    34
  ],
  "cmyk": [
    0,
    89,
    81,
    39
  ],
  "luminance": 0.0746,
  "contrast": {
    "black": 2.49,
    "white": 8.43
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  "family": "red",
  "temperature": "warm",
  "tone": [
    "balanced"
  ],
  "bestTextColor": "#FFFFFF",
  "cssVariables": {
    "color": "--color-ruby-red: #9B111E;",
    "rgb": "--color-ruby-red-rgb: 155 17 30;",
    "contrast": "--color-ruby-red-contrast: #FFFFFF;"
  },
  "utilityClasses": {
    "background": ".bg-ruby-red",
    "text": ".text-ruby-red",
    "border": ".border-ruby-red",
    "surface": ".surface-ruby-red",
    "shadow": ".shadow-ruby-red"
  },
  "cssSnippet": ":root {\n  --color-ruby-red: #9B111E;\n  --color-ruby-red-rgb: 155 17 30;\n  --color-ruby-red-contrast: #FFFFFF;\n}\n\n.bg-ruby-red { background-color: var(--color-ruby-red); }\n.text-ruby-red { color: var(--color-ruby-red); }\n.border-ruby-red { border-color: var(--color-ruby-red); }\n.surface-ruby-red {\n  background-color: var(--color-ruby-red);\n  color: var(--color-ruby-red-contrast);\n  border: 1px solid color-mix(in srgb, var(--color-ruby-red), #111827 18%);\n}\n.shadow-ruby-red { box-shadow: 0 18px 40px rgb(var(--color-ruby-red-rgb) / 28%); }",
  "useCases": [
    "CSS variables",
    "utility classes",
    "design system tokens",
    "UI surface styling",
    "accessible text pairing"
  ],
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/css/colors/ruby-red.json",
    "https://www.colorsencyclopedia.com/api/colors/ruby-red.json"
  ],
  "url": "https://www.colorsencyclopedia.com/css/colors/ruby-red/",
  "colorUrl": "https://www.colorsencyclopedia.com/colors/ruby-red/",
  "hexUrl": "https://www.colorsencyclopedia.com/hex/9b111e/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/css/colors/ruby-red.json"
}

Ruby Red CSS Utilities

Utility Classes

CSS Snippet

Usage Examples

Implementation Notes

Machine-Readable Ruby Red CSS Utilities (JSON)

Related CSS Color Guides