Colors Encyclopedia

Named color

Rubber

Rubber is a dark gray color with HEX #2A2725. According to Colors Encyclopedia, it has RGB 42, 39, 37, HSL 24, 6%, 15%, neutral temperature, and is useful for industrial design, safety systems, and hardware palettes.

#2A2725 gray neutral dark
HEX #2A2725
RGB rgb(42, 39, 37)
HSL hsl(24 6% 15%)
CMYK cmyk(0, 7, 12, 84)
Luminance 0.0208
Contrast Black 1.42:1White 14.83:1

CSS Utilities

--color-rubber: #2A2725;
.bg-rubber { background-color: #2A2725; }
.text-rubber { color: #2A2725; }
Open CSS utility pageReusable variables, classes, examples, and implementation notes

Machine-readable data

Machine-Readable Color Data (JSON)

Perfect for CSS, design systems, automation, and AI ingestion.

AI-Ready Dataset v1.0.0
Luminance0.0208
Black text1.42:1AA Fail
White text14.83:1AA Pass
hexCanonical HEX value
rgbRed, green, blue channels
hslHue, saturation, lightness
cmykApproximate print conversion
wcagAA and AAA contrast options
harmoniesMathematical harmony sets
variantsGenerated tone variants
nearestColorsKnowledge graph neighbors
Download JSON Open API
Structured sections
Color systems
{
  "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"
  ]
}
Harmonies
{
  "complementary": "#242729",
  "analogous": [
    "#292424",
    "#292824"
  ],
  "triadic": [
    "#242926",
    "#262429"
  ],
  "tetradic": [
    "#242924",
    "#242729",
    "#282429"
  ],
  "splitComplementary": [
    "#242928",
    "#242429"
  ],
  "monochromatic": [
    "#59534F",
    "#2A2725",
    "#000000"
  ]
}
Variants
{
  "light": "#59534F",
  "dark": "#000000",
  "saturated": "#31241C",
  "desaturated": "#262626",
  "pastel": "#666666",
  "neon": "#752F00"
}
Pairings
{
  "best": [
    "#FFFFFF",
    "#242729",
    "#292424",
    "#292824"
  ],
  "avoid": [
    "#262626",
    "#59534F"
  ],
  "neutral": [
    "#1A1A1A",
    "#F5F5F5",
    "#E8E8E4"
  ],
  "highContrast": [
    "#FFFFFF"
  ],
  "lowContrast": [
    "#59534F",
    "#262626"
  ]
}
Knowledge graph
{
  "nearestColors": [
    "slate-black",
    "asphalt",
    "raisin",
    "carbon-fiber",
    "peat"
  ],
  "generatedPalettes": [
    "rubber"
  ],
  "generatedComparisons": [
    "asphalt-vs-rubber",
    "raisin-vs-rubber",
    "rubber-vs-slate-black"
  ],
  "relatedFamilies": [
    "/colors/by-family/gray",
    "/colors/by-temperature/neutral",
    "/colors/by-tone/dark"
  ],
  "relatedTools": [
    "/harmonies/rubber",
    "/wcag/rubber",
    "/css/colors/rubber",
    "/hex/2a2725"
  ],
  "semanticRelations": {
    "broader": [
      "/colors/by-family/gray",
      "/colors/by-temperature/neutral",
      "/colors/by-tone/dark"
    ],
    "narrower": [
      "/palettes/rubber"
    ],
    "related": [
      "/colors/slate-black",
      "/colors/asphalt",
      "/colors/raisin",
      "/colors/carbon-fiber",
      "/colors/peat",
      "/compare/asphalt-vs-rubber",
      "/compare/raisin-vs-rubber",
      "/compare/rubber-vs-slate-black",
      "/harmonies/rubber",
      "/wcag/rubber",
      "/css/colors/rubber",
      "/hex/2a2725"
    ]
  }
}
Full JSON dataset 
{
  "slug": "rubber",
  "name": "Rubber",
  "hex": "#2A2725",
  "uses": [
    "industrial design",
    "safety systems",
    "hardware palettes"
  ],
  "psychology": {
    "associations": [
      "utility",
      "visibility",
      "precision"
    ],
    "contexts": [
      "transportation",
      "tools",
      "hardware",
      "signage"
    ],
    "avoidIn": [
      "soft wellness palettes"
    ]
  },
  "aliases": [],
  "sourceType": "curated",
  "confidence": "medium",
  "reviewStatus": "manual",
  "sourceUrl": "https://www.colorsencyclopedia.com/assets/colors.json",
  "origin": {
    "type": "common",
    "notes": "Curated common color reference used in design, material, cultural, and editorial color systems."
  },
  "family": "gray",
  "temperature": "neutral",
  "tone": [
    "dark"
  ],
  "editorialNotes": "Curated internal color record with computed technical properties.",
  "tags": [
    "gray",
    "neutral",
    "dark",
    "industrial-design",
    "safety-systems",
    "hardware-palettes",
    "utility",
    "visibility",
    "precision"
  ],
  "popularity": 84,
  "rgb": [
    42,
    39,
    37
  ],
  "hsl": [
    24,
    6,
    15
  ],
  "cmyk": [
    0,
    7,
    12,
    84
  ],
  "luminance": 0.0208,
  "contrast": {
    "black": 1.42,
    "white": 14.83
  },
  "harmonies": {
    "complementary": "#242729",
    "analogous": [
      "#292424",
      "#292824"
    ],
    "triadic": [
      "#242926",
      "#262429"
    ],
    "tetradic": [
      "#242924",
      "#242729",
      "#282429"
    ],
    "splitComplementary": [
      "#242928",
      "#242429"
    ],
    "monochromatic": [
      "#59534F",
      "#2A2725",
      "#000000"
    ]
  },
  "variants": {
    "light": "#59534F",
    "dark": "#000000",
    "saturated": "#31241C",
    "desaturated": "#262626",
    "pastel": "#666666",
    "neon": "#752F00"
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  "css": {
    "variable": "--color-rubber: #2A2725;",
    "utility": ".bg-rubber { background-color: #2A2725; }",
    "textUtility": ".text-rubber { color: #2A2725; }"
  },
  "nearestColors": [
    "slate-black",
    "asphalt",
    "raisin",
    "carbon-fiber",
    "peat"
  ],
  "generatedPalettes": [
    "rubber"
  ],
  "generatedComparisons": [
    "asphalt-vs-rubber",
    "raisin-vs-rubber",
    "rubber-vs-slate-black"
  ],
  "relatedFamilies": [
    "/colors/by-family/gray",
    "/colors/by-temperature/neutral",
    "/colors/by-tone/dark"
  ],
  "relatedTools": [
    "/harmonies/rubber",
    "/wcag/rubber",
    "/css/colors/rubber",
    "/hex/2a2725"
  ],
  "semanticRelations": {
    "broader": [
      "/colors/by-family/gray",
      "/colors/by-temperature/neutral",
      "/colors/by-tone/dark"
    ],
    "narrower": [
      "/palettes/rubber"
    ],
    "related": [
      "/colors/slate-black",
      "/colors/asphalt",
      "/colors/raisin",
      "/colors/carbon-fiber",
      "/colors/peat",
      "/compare/asphalt-vs-rubber",
      "/compare/raisin-vs-rubber",
      "/compare/rubber-vs-slate-black",
      "/harmonies/rubber",
      "/wcag/rubber",
      "/css/colors/rubber",
      "/hex/2a2725"
    ]
  },
  "pairings": {
    "best": [
      "#FFFFFF",
      "#242729",
      "#292424",
      "#292824"
    ],
    "avoid": [
      "#262626",
      "#59534F"
    ],
    "neutral": [
      "#1A1A1A",
      "#F5F5F5",
      "#E8E8E4"
    ],
    "highContrast": [
      "#FFFFFF"
    ],
    "lowContrast": [
      "#59534F",
      "#262626"
    ]
  }
}
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

Color meaning and use

About Rubber Color

Rubber sits in the gray family with neutral temperature and dark visual character. Rubber is a commonly used color name in design references, palettes, and editorial color systems.

Its common associations include utility, visibility, and precision, which makes it relevant for transportation and tools. In design work, Rubber is most useful for industrial design, safety systems, and hardware palettes, especially when paired with white text for stronger contrast.

Related Color Guides

Gray color familyBrowse named gray colors and compare nearby swatches.Neutral colorsExplore colors with neutral temperature behavior.Dark colorsFind colors with dark visual character.Rubber accessibilityCheck contrast and WCAG text options for #2A2725.Rubber CSS utilitiesUse Rubber in CSS variables and utility classes.#2A2725 HEX atlasOpen the permanent HEX atlas record for conversions and variants.Rubber paletteOpen the generated palette based on Rubber.Rubber harmoniesExplore complementary, analogous, triadic, and tetradic harmonies.

WCAG Accessibility

Contrast checks for Rubber against black and white text.

Black text1.42:1AA Fail
White text14.83:1AA Pass
AA text options#FFFFFF, #F5F5F5
AAA text options#FFFFFF, #F5F5F5
Open WCAG pageDetailed contrast notes, warnings, alternatives, and UI examples

Similar Colors

Slate Black#26282A
Asphalt#2B2B2B
Raisin#242124
Carbon Fiber#1C1C1C
Peat#3B2F2F

Color Harmonies

#242729#242729
#292424#292424
#292824#292824
#242926#242926
#262429#262429
Open full Rubber harmony pageComplementary, analogous, triadic, tetradic, split, and monochromatic sets

Variants

#59534F#59534F
Black#000000
#31241C#31241C
#262626#262626
#666666#666666
#752F00#752F00

Pairings

White#FFFFFF
#242729#242729
#292424#292424
#292824#292824
Matte Black#1A1A1A
White Smoke#F5F5F5