CSS utility

Rubber CSS Utilities

Rubber CSS utilities for #2A2725: copy variables and classes for backgrounds, text, borders and surfaces, with RGB tokens and contrast guidance.

Color page #2A2725 WCAG

Preview Rubber #2A2725

Utility Classes

Background.bg-rubber

Text.text-rubber

Border.border-rubber

Surface.surface-rubber

CSS Snippet

:root {
  --color-rubber: #2A2725;
  --color-rubber-rgb: 42 39 37;
  --color-rubber-contrast: #FFFFFF;
}

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

Usage Examples

Surface cardRubber uses #FFFFFF as its stronger standard foreground at 14.83:1.

Border accentUse #2A2725 as a neutral gray outline, divider, or interface accent.

Text accentPlace #2A2725 on a checked contrasting surface before using it for text, links, or icons.

Implementation Notes

Best text color#FFFFFF

Black contrast1.42:1

White contrast14.83:1

RGB token42 39 37

Luminance0.0208

Black text1.42:1AA Fail

White text14.83:1AA 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-rubber: #2A2725;",
  "rgb": "--color-rubber-rgb: 42 39 37;",
  "contrast": "--color-rubber-contrast: #FFFFFF;"
}

Utility classes

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

Accessibility

{
  "bestTextColor": "#FFFFFF",
  "contrast": {
    "black": 1.42,
    "white": 14.83
  },
  "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-rubber: #2A2725;\n  --color-rubber-rgb: 42 39 37;\n  --color-rubber-contrast: #FFFFFF;\n}\n\n.bg-rubber { background-color: var(--color-rubber); }\n.text-rubber { color: var(--color-rubber); }\n.border-rubber { border-color: var(--color-rubber); }\n.surface-rubber {\n  background-color: var(--color-rubber);\n  color: var(--color-rubber-contrast);\n  border: 1px solid color-mix(in srgb, var(--color-rubber), #111827 18%);\n}\n.shadow-rubber { box-shadow: 0 18px 40px rgb(var(--color-rubber-rgb) / 28%); }"
}

Related endpoints

[
  "https://www.colorsencyclopedia.com/api/css/colors/rubber.json",
  "https://www.colorsencyclopedia.com/api/colors/rubber.json"
]

Full JSON dataset

{
  "datasetVersion": "1.0.0",
  "slug": "rubber",
  "name": "Rubber",
  "hex": "#2A2725",
  "rgb": [
    42,
    39,
    37
  ],
  "hsl": [
    24,
    6,
    15
  ],
  "cmyk": [
    0,
    7,
    12,
    84
  ],
  "luminance": 0.0208,
  "contrast": {
    "black": 1.42,
    "white": 14.83
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  "family": "gray",
  "temperature": "neutral",
  "tone": [
    "dark"
  ],
  "bestTextColor": "#FFFFFF",
  "cssVariables": {
    "color": "--color-rubber: #2A2725;",
    "rgb": "--color-rubber-rgb: 42 39 37;",
    "contrast": "--color-rubber-contrast: #FFFFFF;"
  },
  "utilityClasses": {
    "background": ".bg-rubber",
    "text": ".text-rubber",
    "border": ".border-rubber",
    "surface": ".surface-rubber",
    "shadow": ".shadow-rubber"
  },
  "cssSnippet": ":root {\n  --color-rubber: #2A2725;\n  --color-rubber-rgb: 42 39 37;\n  --color-rubber-contrast: #FFFFFF;\n}\n\n.bg-rubber { background-color: var(--color-rubber); }\n.text-rubber { color: var(--color-rubber); }\n.border-rubber { border-color: var(--color-rubber); }\n.surface-rubber {\n  background-color: var(--color-rubber);\n  color: var(--color-rubber-contrast);\n  border: 1px solid color-mix(in srgb, var(--color-rubber), #111827 18%);\n}\n.shadow-rubber { box-shadow: 0 18px 40px rgb(var(--color-rubber-rgb) / 28%); }",
  "useCases": [
    "CSS variables",
    "utility classes",
    "design system tokens",
    "UI surface styling",
    "accessible text pairing"
  ],
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/css/colors/rubber.json",
    "https://www.colorsencyclopedia.com/api/colors/rubber.json"
  ],
  "url": "https://www.colorsencyclopedia.com/css/colors/rubber/",
  "colorUrl": "https://www.colorsencyclopedia.com/colors/rubber/",
  "hexUrl": "https://www.colorsencyclopedia.com/hex/2a2725/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/css/colors/rubber.json"
}

Rubber CSS Utilities

Utility Classes

CSS Snippet

Usage Examples

Implementation Notes

Machine-Readable Rubber CSS Utilities (JSON)

Related CSS Color Guides