Nearest-color comparison

Rubber vs Slate Black

Rubber and Slate Black are different gray colors with HEX values #2A2725 and #26282A. According to Colors Encyclopedia, their RGB distance is 6.5, their contrast ratio is 1:1, and the comparison helps choose between tone, temperature, and accessibility behavior.

Rubber and Slate Black are very close colors. Slate Black is the lighter option. They share similar temperature behavior. Their mutual contrast is 1:1, so the pair is too low for text and better treated as a palette relationship.

Differences Use cases Accessibility JSON

Rubber#2A2725

Slate Black#26282A

Quick Difference Summary

The main measurable differences between Rubber and Slate Black across RGB distance, luminance, hue, saturation, and contrast.

RGB distance6.5

Pair contrast1:1

Luminance delta0.0002

Hue delta186 deg

Lighter colorSlate Black

More saturatedRubber

Side-by-Side Color Profiles

gray color

Rubber

Rubber is #2A2725, a neutral gray color with dark character. Compared with Slate Black, it is darker and more saturated. Use it for industrial design, safety systems, and hardware palettes, with white text as the safer foreground option.

HEX#2A2725 RGB42, 39, 37 HSL24, 6, 15 CMYK0, 7, 12, 84 Luminance0.0208 Best textwhite text

Color page WCAG HEX atlas

gray color

Slate Black

Slate Black is #26282A, a neutral gray color with dark character. Compared with Rubber, it is lighter and less saturated. Use it for backgrounds, typography, and product surfaces, with white text as the safer foreground option.

HEX#26282A RGB38, 40, 42 HSL210, 5, 16 CMYK10, 5, 0, 84 Luminance0.021 Best textwhite text

Color page WCAG HEX atlas

When to Use Rubber or Slate Black

Choose RubberRubber is better when the design needs dark gray character, neutral temperature, and the specific HEX value #2A2725.

Choose Slate BlackSlate Black is better when the design needs dark gray character, neutral temperature, and the specific HEX value #26282A.

Use togetherUse these colors together as related palette neighbors, subtle material differences, or tonal alternatives rather than readable foreground/background pairs.

Technical Comparison Table

PropertyRubberSlate Black

HEX#2A2725#26282A

RGB42, 39, 3738, 40, 42

HSL24, 6, 15210, 5, 16

CMYK0, 7, 12, 8410, 5, 0, 84

FamilyGrayGray

TemperatureNeutralNeutral

ToneDarkDark

Luminance0.02080.021

Black contrast1.42:11.42:1

White contrast14.83:114.79:1

Shared tonesDark

Accessibility and Contrast

Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.

Rubberwhite text - 14.83:1

Slate Blackwhite text - 14.79:1

Related Palette Strip

A compact visual strip showing the two compared colors with nearby harmony and variant context.

Rubber#2A2725

Slate Black#26282A

#59534F#59534F

#52575B#52575B

#242729#242729

#2B2927#2B2927

colorsBoth named color records with HEX, RGB, HSL, CMYK, luminance, WCAG, and links

differencesRGB distance, HSL deltas, luminance delta, contrast, and shared attributes

accessibilityPair contrast and safer text choices for each color

useCasesWhen to choose each color and when to use them together

relatedApiMachine-readable comparison and color endpoints

Structured sections

Colors

[
  {
    "slug": "rubber",
    "name": "Rubber",
    "hex": "#2A2725",
    "rgb": [
      42,
      39,
      37
    ],
    "hsl": [
      24,
      6,
      15
    ],
    "cmyk": [
      0,
      7,
      12,
      84
    ],
    "family": "gray",
    "temperature": "neutral",
    "tone": [
      "dark"
    ],
    "luminance": 0.0208,
    "contrast": {
      "black": 1.42,
      "white": 14.83
    },
    "wcag": {
      "AA": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "AAA": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    },
    "bestText": {
      "text": "#FFFFFF",
      "label": "white text",
      "ratio": 14.83
    },
    "description": "Rubber is #2A2725, a neutral gray color with dark character. Compared with Slate Black, it is darker and more saturated. Use it for industrial design, safety systems, and hardware palettes, with white text as the safer foreground option.",
    "url": "https://www.colorsencyclopedia.com/colors/rubber/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/rubber.json"
  },
  {
    "slug": "slate-black",
    "name": "Slate Black",
    "hex": "#26282A",
    "rgb": [
      38,
      40,
      42
    ],
    "hsl": [
      210,
      5,
      16
    ],
    "cmyk": [
      10,
      5,
      0,
      84
    ],
    "family": "gray",
    "temperature": "neutral",
    "tone": [
      "dark"
    ],
    "luminance": 0.021,
    "contrast": {
      "black": 1.42,
      "white": 14.79
    },
    "wcag": {
      "AA": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "AAA": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    },
    "bestText": {
      "text": "#FFFFFF",
      "label": "white text",
      "ratio": 14.79
    },
    "description": "Slate Black is #26282A, a neutral gray color with dark character. Compared with Rubber, it is lighter and less saturated. Use it for backgrounds, typography, and product surfaces, with white text as the safer foreground option.",
    "url": "https://www.colorsencyclopedia.com/colors/slate-black/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-black.json"
  }
]

Differences

{
  "rgbDistance": 6.5,
  "contrastRatio": 1,
  "hslDelta": {
    "hue": 186,
    "saturation": 1,
    "lightness": 1
  },
  "luminanceDelta": 0.0002,
  "sameFamily": true,
  "sameTemperature": true,
  "sharedTones": [
    "dark"
  ],
  "lighterColor": "Slate Black",
  "moreSaturatedColor": "Rubber"
}

Accessibility

{
  "pairContrastRatio": 1,
  "textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
  "safeText": [
    {
      "color": "Rubber",
      "background": "#2A2725",
      "foreground": "#FFFFFF",
      "label": "white text",
      "ratio": 14.83
    },
    {
      "color": "Slate Black",
      "background": "#26282A",
      "foreground": "#FFFFFF",
      "label": "white text",
      "ratio": 14.79
    }
  ]
}

Use cases

{
  "chooseFirstWhen": "Rubber is better when the design needs dark gray character, neutral temperature, and the specific HEX value #2A2725.",
  "chooseSecondWhen": "Slate Black is better when the design needs dark gray character, neutral temperature, and the specific HEX value #26282A.",
  "useTogetherWhen": "Use these colors together as related palette neighbors, subtle material differences, or tonal alternatives rather than readable foreground/background pairs."
}

Related API

[
  "https://www.colorsencyclopedia.com/api/compare/rubber-vs-slate-black.json",
  "https://www.colorsencyclopedia.com/api/colors/rubber.json",
  "https://www.colorsencyclopedia.com/api/colors/slate-black.json"
]

Full JSON dataset

{
  "datasetVersion": "1.0.0",
  "slug": "rubber-vs-slate-black",
  "type": "nearest",
  "name": "Rubber vs Slate Black",
  "verdict": "Rubber and Slate Black are very close colors. Slate Black is the lighter option. They share similar temperature behavior. Their mutual contrast is 1:1, so the pair is too low for text and better treated as a palette relationship.",
  "summary": "Rubber and Slate Black are different gray colors with HEX values #2A2725 and #26282A. According to Colors Encyclopedia, their RGB distance is 6.5, their contrast ratio is 1:1, and the comparison helps choose between tone, temperature, and accessibility behavior.",
  "rgbDistance": 6.5,
  "contrastRatio": 1,
  "colors": [
    {
      "slug": "rubber",
      "name": "Rubber",
      "hex": "#2A2725",
      "rgb": [
        42,
        39,
        37
      ],
      "hsl": [
        24,
        6,
        15
      ],
      "cmyk": [
        0,
        7,
        12,
        84
      ],
      "family": "gray",
      "temperature": "neutral",
      "tone": [
        "dark"
      ],
      "luminance": 0.0208,
      "contrast": {
        "black": 1.42,
        "white": 14.83
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      },
      "bestText": {
        "text": "#FFFFFF",
        "label": "white text",
        "ratio": 14.83
      },
      "description": "Rubber is #2A2725, a neutral gray color with dark character. Compared with Slate Black, it is darker and more saturated. Use it for industrial design, safety systems, and hardware palettes, with white text as the safer foreground option.",
      "url": "https://www.colorsencyclopedia.com/colors/rubber/",
      "apiUrl": "https://www.colorsencyclopedia.com/api/colors/rubber.json"
    },
    {
      "slug": "slate-black",
      "name": "Slate Black",
      "hex": "#26282A",
      "rgb": [
        38,
        40,
        42
      ],
      "hsl": [
        210,
        5,
        16
      ],
      "cmyk": [
        10,
        5,
        0,
        84
      ],
      "family": "gray",
      "temperature": "neutral",
      "tone": [
        "dark"
      ],
      "luminance": 0.021,
      "contrast": {
        "black": 1.42,
        "white": 14.79
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      },
      "bestText": {
        "text": "#FFFFFF",
        "label": "white text",
        "ratio": 14.79
      },
      "description": "Slate Black is #26282A, a neutral gray color with dark character. Compared with Rubber, it is lighter and less saturated. Use it for backgrounds, typography, and product surfaces, with white text as the safer foreground option.",
      "url": "https://www.colorsencyclopedia.com/colors/slate-black/",
      "apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-black.json"
    }
  ],
  "differences": {
    "rgbDistance": 6.5,
    "contrastRatio": 1,
    "hslDelta": {
      "hue": 186,
      "saturation": 1,
      "lightness": 1
    },
    "luminanceDelta": 0.0002,
    "sameFamily": true,
    "sameTemperature": true,
    "sharedTones": [
      "dark"
    ],
    "lighterColor": "Slate Black",
    "moreSaturatedColor": "Rubber"
  },
  "accessibility": {
    "pairContrastRatio": 1,
    "textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
    "safeText": [
      {
        "color": "Rubber",
        "background": "#2A2725",
        "foreground": "#FFFFFF",
        "label": "white text",
        "ratio": 14.83
      },
      {
        "color": "Slate Black",
        "background": "#26282A",
        "foreground": "#FFFFFF",
        "label": "white text",
        "ratio": 14.79
      }
    ]
  },
  "useCases": {
    "chooseFirstWhen": "Rubber is better when the design needs dark gray character, neutral temperature, and the specific HEX value #2A2725.",
    "chooseSecondWhen": "Slate Black is better when the design needs dark gray character, neutral temperature, and the specific HEX value #26282A.",
    "useTogetherWhen": "Use these colors together as related palette neighbors, subtle material differences, or tonal alternatives rather than readable foreground/background pairs."
  },
  "relatedApi": [
    "https://www.colorsencyclopedia.com/api/compare/rubber-vs-slate-black.json",
    "https://www.colorsencyclopedia.com/api/colors/rubber.json",
    "https://www.colorsencyclopedia.com/api/colors/slate-black.json"
  ],
  "url": "https://www.colorsencyclopedia.com/compare/rubber-vs-slate-black/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/compare/rubber-vs-slate-black.json"
}