Nearest-color comparison

Slate Gray vs Slate Grey

Slate Gray and Slate Grey are different blue colors with HEX values #708090 and #708090. According to Colors Encyclopedia, their RGB distance is 0, their contrast ratio is 1:1, and the comparison helps choose between tone, temperature, and accessibility behavior.

Slate Gray and Slate Grey are very close colors. They have nearly identical luminance. 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

Slate Gray#708090

Slate Grey#708090

Quick Difference Summary

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

RGB distance0

Pair contrast1:1

Luminance delta0

Hue delta0 deg

Lighter colorSlate Gray

More saturatedSlate Gray

Side-by-Side Color Profiles

blue color

Slate Gray

Slate Gray is #708090, a cool blue color with muted character. Compared with Slate Grey, it is similar in luminance and similar in saturation. Use it for web design, css color systems, and ui prototyping, with black text as the safer foreground option.

HEX#708090 RGB112, 128, 144 HSL210, 13, 50 CMYK22, 11, 0, 44 Luminance0.209 Best textblack text

Color page WCAG HEX atlas

blue color

Slate Grey

Slate Grey is #708090, a cool blue color with muted character. Compared with Slate Gray, it is similar in luminance and similar in saturation. Use it for web design, css color systems, and ui prototyping, with black text as the safer foreground option.

HEX#708090 RGB112, 128, 144 HSL210, 13, 50 CMYK22, 11, 0, 44 Luminance0.209 Best textblack text

Color page WCAG HEX atlas

When to Use Slate Gray or Slate Grey

Choose Slate GraySlate Gray is better when the design needs muted blue character, cool temperature, and the specific HEX value #708090.

Choose Slate GreySlate Grey is better when the design needs muted blue character, cool temperature, and the specific HEX value #708090.

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

Technical Comparison Table

PropertySlate GraySlate Grey

HEX#708090#708090

RGB112, 128, 144112, 128, 144

HSL210, 13, 50210, 13, 50

CMYK22, 11, 0, 4422, 11, 0, 44

FamilyBlueBlue

TemperatureCoolCool

ToneMutedMuted

Luminance0.2090.209

Black contrast5.18:15.18:1

White contrast4.05:14.05:1

Shared tonesMuted

Accessibility and Contrast

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

Slate Grayblack text - 5.18:1

Slate Greyblack text - 5.18:1

Related Palette Strip

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

Slate Grey#708090

#A3ADB8#A3ADB8

#90806F#90806F

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": "slate-gray",
    "name": "Slate Gray",
    "hex": "#708090",
    "rgb": [
      112,
      128,
      144
    ],
    "hsl": [
      210,
      13,
      50
    ],
    "cmyk": [
      22,
      11,
      0,
      44
    ],
    "family": "blue",
    "temperature": "cool",
    "tone": [
      "muted"
    ],
    "luminance": 0.209,
    "contrast": {
      "black": 5.18,
      "white": 4.05
    },
    "wcag": {
      "AA": [
        "#000000"
      ],
      "AAA": []
    },
    "bestText": {
      "text": "#000000",
      "label": "black text",
      "ratio": 5.18
    },
    "description": "Slate Gray is #708090, a cool blue color with muted character. Compared with Slate Grey, it is similar in luminance and similar in saturation. Use it for web design, css color systems, and ui prototyping, with black text as the safer foreground option.",
    "url": "https://www.colorsencyclopedia.com/colors/slate-gray/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-gray.json"
  },
  {
    "slug": "slate-grey",
    "name": "Slate Grey",
    "hex": "#708090",
    "rgb": [
      112,
      128,
      144
    ],
    "hsl": [
      210,
      13,
      50
    ],
    "cmyk": [
      22,
      11,
      0,
      44
    ],
    "family": "blue",
    "temperature": "cool",
    "tone": [
      "muted"
    ],
    "luminance": 0.209,
    "contrast": {
      "black": 5.18,
      "white": 4.05
    },
    "wcag": {
      "AA": [
        "#000000"
      ],
      "AAA": []
    },
    "bestText": {
      "text": "#000000",
      "label": "black text",
      "ratio": 5.18
    },
    "description": "Slate Grey is #708090, a cool blue color with muted character. Compared with Slate Gray, it is similar in luminance and similar in saturation. Use it for web design, css color systems, and ui prototyping, with black text as the safer foreground option.",
    "url": "https://www.colorsencyclopedia.com/colors/slate-grey/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-grey.json"
  }
]

Differences

{
  "rgbDistance": 0,
  "contrastRatio": 1,
  "hslDelta": {
    "hue": 0,
    "saturation": 0,
    "lightness": 0
  },
  "luminanceDelta": 0,
  "sameFamily": true,
  "sameTemperature": true,
  "sharedTones": [
    "muted"
  ],
  "lighterColor": "Slate Gray",
  "moreSaturatedColor": "Slate Gray"
}

Accessibility

{
  "pairContrastRatio": 1,
  "textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
  "safeText": [
    {
      "color": "Slate Gray",
      "background": "#708090",
      "foreground": "#000000",
      "label": "black text",
      "ratio": 5.18
    },
    {
      "color": "Slate Grey",
      "background": "#708090",
      "foreground": "#000000",
      "label": "black text",
      "ratio": 5.18
    }
  ]
}

Use cases

{
  "chooseFirstWhen": "Slate Gray is better when the design needs muted blue character, cool temperature, and the specific HEX value #708090.",
  "chooseSecondWhen": "Slate Grey is better when the design needs muted blue character, cool temperature, and the specific HEX value #708090.",
  "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/slate-gray-vs-slate-grey.json",
  "https://www.colorsencyclopedia.com/api/colors/slate-gray.json",
  "https://www.colorsencyclopedia.com/api/colors/slate-grey.json"
]

Full JSON dataset

{
  "datasetVersion": "1.0.0",
  "slug": "slate-gray-vs-slate-grey",
  "type": "nearest",
  "name": "Slate Gray vs Slate Grey",
  "verdict": "Slate Gray and Slate Grey are very close colors. They have nearly identical luminance. 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": "Slate Gray and Slate Grey are different blue colors with HEX values #708090 and #708090. According to Colors Encyclopedia, their RGB distance is 0, their contrast ratio is 1:1, and the comparison helps choose between tone, temperature, and accessibility behavior.",
  "rgbDistance": 0,
  "contrastRatio": 1,
  "colors": [
    {
      "slug": "slate-gray",
      "name": "Slate Gray",
      "hex": "#708090",
      "rgb": [
        112,
        128,
        144
      ],
      "hsl": [
        210,
        13,
        50
      ],
      "cmyk": [
        22,
        11,
        0,
        44
      ],
      "family": "blue",
      "temperature": "cool",
      "tone": [
        "muted"
      ],
      "luminance": 0.209,
      "contrast": {
        "black": 5.18,
        "white": 4.05
      },
      "wcag": {
        "AA": [
          "#000000"
        ],
        "AAA": []
      },
      "bestText": {
        "text": "#000000",
        "label": "black text",
        "ratio": 5.18
      },
      "description": "Slate Gray is #708090, a cool blue color with muted character. Compared with Slate Grey, it is similar in luminance and similar in saturation. Use it for web design, css color systems, and ui prototyping, with black text as the safer foreground option.",
      "url": "https://www.colorsencyclopedia.com/colors/slate-gray/",
      "apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-gray.json"
    },
    {
      "slug": "slate-grey",
      "name": "Slate Grey",
      "hex": "#708090",
      "rgb": [
        112,
        128,
        144
      ],
      "hsl": [
        210,
        13,
        50
      ],
      "cmyk": [
        22,
        11,
        0,
        44
      ],
      "family": "blue",
      "temperature": "cool",
      "tone": [
        "muted"
      ],
      "luminance": 0.209,
      "contrast": {
        "black": 5.18,
        "white": 4.05
      },
      "wcag": {
        "AA": [
          "#000000"
        ],
        "AAA": []
      },
      "bestText": {
        "text": "#000000",
        "label": "black text",
        "ratio": 5.18
      },
      "description": "Slate Grey is #708090, a cool blue color with muted character. Compared with Slate Gray, it is similar in luminance and similar in saturation. Use it for web design, css color systems, and ui prototyping, with black text as the safer foreground option.",
      "url": "https://www.colorsencyclopedia.com/colors/slate-grey/",
      "apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-grey.json"
    }
  ],
  "differences": {
    "rgbDistance": 0,
    "contrastRatio": 1,
    "hslDelta": {
      "hue": 0,
      "saturation": 0,
      "lightness": 0
    },
    "luminanceDelta": 0,
    "sameFamily": true,
    "sameTemperature": true,
    "sharedTones": [
      "muted"
    ],
    "lighterColor": "Slate Gray",
    "moreSaturatedColor": "Slate Gray"
  },
  "accessibility": {
    "pairContrastRatio": 1,
    "textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
    "safeText": [
      {
        "color": "Slate Gray",
        "background": "#708090",
        "foreground": "#000000",
        "label": "black text",
        "ratio": 5.18
      },
      {
        "color": "Slate Grey",
        "background": "#708090",
        "foreground": "#000000",
        "label": "black text",
        "ratio": 5.18
      }
    ]
  },
  "useCases": {
    "chooseFirstWhen": "Slate Gray is better when the design needs muted blue character, cool temperature, and the specific HEX value #708090.",
    "chooseSecondWhen": "Slate Grey is better when the design needs muted blue character, cool temperature, and the specific HEX value #708090.",
    "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/slate-gray-vs-slate-grey.json",
    "https://www.colorsencyclopedia.com/api/colors/slate-gray.json",
    "https://www.colorsencyclopedia.com/api/colors/slate-grey.json"
  ],
  "url": "https://www.colorsencyclopedia.com/compare/slate-gray-vs-slate-grey/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/compare/slate-gray-vs-slate-grey.json"
}