CSS utility

Sienna CSS Utilities

Sienna CSS utilities provide reusable variables and utility classes for #A0522D. 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 #A0522D WCAG

Preview Sienna #A0522D

Utility Classes

Background.bg-sienna

Text.text-sienna

Border.border-sienna

Surface.surface-sienna

CSS Snippet

:root {
  --color-sienna: #A0522D;
  --color-sienna-rgb: 160 82 45;
  --color-sienna-contrast: #FFFFFF;
}

.bg-sienna { background-color: var(--color-sienna); }
.text-sienna { color: var(--color-sienna); }
.border-sienna { border-color: var(--color-sienna); }
.surface-sienna {
  background-color: var(--color-sienna);
  color: var(--color-sienna-contrast);
  border: 1px solid color-mix(in srgb, var(--color-sienna), #111827 18%);
}
.shadow-sienna { box-shadow: 0 18px 40px rgb(var(--color-sienna-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 contrast3.74:1

White contrast5.61:1

RGB token160 82 45

Luminance0.137

Black text3.74:1AA Fail

White text5.61:1AA 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-sienna: #A0522D;",
  "rgb": "--color-sienna-rgb: 160 82 45;",
  "contrast": "--color-sienna-contrast: #FFFFFF;"
}

Utility classes

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

Accessibility

{
  "bestTextColor": "#FFFFFF",
  "contrast": {
    "black": 3.74,
    "white": 5.61
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": []
  }
}

Implementation

{
  "useCases": [
    "CSS variables",
    "utility classes",
    "design system tokens",
    "UI surface styling",
    "accessible text pairing"
  ],
  "cssSnippet": ":root {\n  --color-sienna: #A0522D;\n  --color-sienna-rgb: 160 82 45;\n  --color-sienna-contrast: #FFFFFF;\n}\n\n.bg-sienna { background-color: var(--color-sienna); }\n.text-sienna { color: var(--color-sienna); }\n.border-sienna { border-color: var(--color-sienna); }\n.surface-sienna {\n  background-color: var(--color-sienna);\n  color: var(--color-sienna-contrast);\n  border: 1px solid color-mix(in srgb, var(--color-sienna), #111827 18%);\n}\n.shadow-sienna { box-shadow: 0 18px 40px rgb(var(--color-sienna-rgb) / 28%); }"
}

Related endpoints

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

Full JSON dataset

{
  "datasetVersion": "1.0.0",
  "slug": "sienna",
  "name": "Sienna",
  "hex": "#A0522D",
  "rgb": [
    160,
    82,
    45
  ],
  "hsl": [
    19,
    56,
    40
  ],
  "cmyk": [
    0,
    49,
    72,
    37
  ],
  "luminance": 0.137,
  "contrast": {
    "black": 3.74,
    "white": 5.61
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": []
  },
  "family": "orange",
  "temperature": "warm",
  "tone": [
    "earth-tone"
  ],
  "bestTextColor": "#FFFFFF",
  "cssVariables": {
    "color": "--color-sienna: #A0522D;",
    "rgb": "--color-sienna-rgb: 160 82 45;",
    "contrast": "--color-sienna-contrast: #FFFFFF;"
  },
  "utilityClasses": {
    "background": ".bg-sienna",
    "text": ".text-sienna",
    "border": ".border-sienna",
    "surface": ".surface-sienna",
    "shadow": ".shadow-sienna"
  },
  "cssSnippet": ":root {\n  --color-sienna: #A0522D;\n  --color-sienna-rgb: 160 82 45;\n  --color-sienna-contrast: #FFFFFF;\n}\n\n.bg-sienna { background-color: var(--color-sienna); }\n.text-sienna { color: var(--color-sienna); }\n.border-sienna { border-color: var(--color-sienna); }\n.surface-sienna {\n  background-color: var(--color-sienna);\n  color: var(--color-sienna-contrast);\n  border: 1px solid color-mix(in srgb, var(--color-sienna), #111827 18%);\n}\n.shadow-sienna { box-shadow: 0 18px 40px rgb(var(--color-sienna-rgb) / 28%); }",
  "useCases": [
    "CSS variables",
    "utility classes",
    "design system tokens",
    "UI surface styling",
    "accessible text pairing"
  ],
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/css/colors/sienna.json",
    "https://www.colorsencyclopedia.com/api/colors/sienna.json"
  ],
  "url": "https://www.colorsencyclopedia.com/css/colors/sienna/",
  "colorUrl": "https://www.colorsencyclopedia.com/colors/sienna/",
  "hexUrl": "https://www.colorsencyclopedia.com/hex/a0522d/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/css/colors/sienna.json"
}

Sienna CSS Utilities

Utility Classes

CSS Snippet

Usage Examples

Implementation Notes

Machine-Readable Sienna CSS Utilities (JSON)

Related CSS Color Guides