CSS utility

Gunmetal CSS Utilities

Gunmetal CSS utilities for #2A3439: copy variables and classes for backgrounds, text, borders and surfaces, with RGB tokens and contrast guidance.

Color page #2A3439 WCAG

Preview Gunmetal #2A3439

Utility Classes

Background.bg-gunmetal

Text.text-gunmetal

Border.border-gunmetal

Surface.surface-gunmetal

CSS Snippet

:root {
  --color-gunmetal: #2A3439;
  --color-gunmetal-rgb: 42 52 57;
  --color-gunmetal-contrast: #FFFFFF;
}

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

Usage Examples

Surface cardGunmetal uses #FFFFFF as its stronger standard foreground at 12.74:1.

Border accentUse #2A3439 as a cool blue outline, divider, or interface accent.

Text accentPlace #2A3439 on a checked contrasting surface before using it for text, links, or icons.

Implementation Notes

Best text color#FFFFFF

Black contrast1.65:1

White contrast12.74:1

RGB token42 52 57

Luminance0.0324

Black text1.65:1AA Fail

White text12.74:1AA 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-gunmetal: #2A3439;",
  "rgb": "--color-gunmetal-rgb: 42 52 57;",
  "contrast": "--color-gunmetal-contrast: #FFFFFF;"
}

Utility classes

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

Accessibility

{
  "bestTextColor": "#FFFFFF",
  "contrast": {
    "black": 1.65,
    "white": 12.74
  },
  "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-gunmetal: #2A3439;\n  --color-gunmetal-rgb: 42 52 57;\n  --color-gunmetal-contrast: #FFFFFF;\n}\n\n.bg-gunmetal { background-color: var(--color-gunmetal); }\n.text-gunmetal { color: var(--color-gunmetal); }\n.border-gunmetal { border-color: var(--color-gunmetal); }\n.surface-gunmetal {\n  background-color: var(--color-gunmetal);\n  color: var(--color-gunmetal-contrast);\n  border: 1px solid color-mix(in srgb, var(--color-gunmetal), #111827 18%);\n}\n.shadow-gunmetal { box-shadow: 0 18px 40px rgb(var(--color-gunmetal-rgb) / 28%); }"
}

Related endpoints

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

Full JSON dataset

{
  "datasetVersion": "1.0.0",
  "slug": "gunmetal",
  "name": "Gunmetal",
  "hex": "#2A3439",
  "rgb": [
    42,
    52,
    57
  ],
  "hsl": [
    200,
    15,
    19
  ],
  "cmyk": [
    26,
    9,
    0,
    78
  ],
  "luminance": 0.0324,
  "contrast": {
    "black": 1.65,
    "white": 12.74
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  "family": "blue",
  "temperature": "cool",
  "tone": [
    "dark"
  ],
  "bestTextColor": "#FFFFFF",
  "cssVariables": {
    "color": "--color-gunmetal: #2A3439;",
    "rgb": "--color-gunmetal-rgb: 42 52 57;",
    "contrast": "--color-gunmetal-contrast: #FFFFFF;"
  },
  "utilityClasses": {
    "background": ".bg-gunmetal",
    "text": ".text-gunmetal",
    "border": ".border-gunmetal",
    "surface": ".surface-gunmetal",
    "shadow": ".shadow-gunmetal"
  },
  "cssSnippet": ":root {\n  --color-gunmetal: #2A3439;\n  --color-gunmetal-rgb: 42 52 57;\n  --color-gunmetal-contrast: #FFFFFF;\n}\n\n.bg-gunmetal { background-color: var(--color-gunmetal); }\n.text-gunmetal { color: var(--color-gunmetal); }\n.border-gunmetal { border-color: var(--color-gunmetal); }\n.surface-gunmetal {\n  background-color: var(--color-gunmetal);\n  color: var(--color-gunmetal-contrast);\n  border: 1px solid color-mix(in srgb, var(--color-gunmetal), #111827 18%);\n}\n.shadow-gunmetal { box-shadow: 0 18px 40px rgb(var(--color-gunmetal-rgb) / 28%); }",
  "useCases": [
    "CSS variables",
    "utility classes",
    "design system tokens",
    "UI surface styling",
    "accessible text pairing"
  ],
  "relatedEndpoints": [
    "https://www.colorsencyclopedia.com/api/css/colors/gunmetal.json",
    "https://www.colorsencyclopedia.com/api/colors/gunmetal.json"
  ],
  "url": "https://www.colorsencyclopedia.com/css/colors/gunmetal/",
  "colorUrl": "https://www.colorsencyclopedia.com/colors/gunmetal/",
  "hexUrl": "https://www.colorsencyclopedia.com/hex/2a3439/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/css/colors/gunmetal.json"
}

Gunmetal CSS Utilities

Utility Classes

CSS Snippet

Usage Examples

Implementation Notes

Machine-Readable Gunmetal CSS Utilities (JSON)

Related CSS Color Guides