Nearest-color comparison

Dark Slate Blue vs Iolite

Dark Slate Blue and Iolite are different blue colors with HEX values #483D8B and #5A4C8D. According to Colors Encyclopedia, their RGB distance is 23.5, their contrast ratio is 1.23:1, and the comparison helps choose between tone, temperature, and accessibility behavior.

Dark Slate Blue and Iolite are very close colors. Iolite is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.23:1, so the pair is too low for text and better treated as a palette relationship.

Differences Use cases Accessibility JSON

Dark Slate Blue#483D8B

Iolite#5A4C8D

Quick Difference Summary

The main measurable differences between Dark Slate Blue and Iolite across RGB distance, luminance, hue, saturation, and contrast.

RGB distance23.5

Pair contrast1.23:1

Luminance delta0.0269

Hue delta5 deg

Lighter colorIolite

More saturatedDark Slate Blue

Side-by-Side Color Profiles

blue color

Dark Slate Blue

Dark Slate Blue is #483D8B, a cool blue color with balanced character. Compared with Iolite, it is darker and more saturated. Use it for web design, css color systems, and ui prototyping, with white text as the safer foreground option.

HEX#483D8B RGB72, 61, 139 HSL248, 39, 39 CMYK48, 56, 0, 45 Luminance0.0658 Best textwhite text

Color page WCAG HEX atlas

blue color

Iolite

Iolite is #5A4C8D, a cool blue color with balanced character. Compared with Dark Slate Blue, it is lighter and less saturated. Use it for jewel-tone palettes, luxury branding, and premium interface accents, with white text as the safer foreground option.

HEX#5A4C8D RGB90, 76, 141 HSL253, 30, 43 CMYK36, 46, 0, 45 Luminance0.0927 Best textwhite text

Color page WCAG HEX atlas

When to Use Dark Slate Blue or Iolite

Choose Dark Slate BlueDark Slate Blue is better when the design needs balanced blue character, cool temperature, and the specific HEX value #483D8B.

Choose IoliteIolite is better when the design needs balanced blue character, cool temperature, and the specific HEX value #5A4C8D.

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

Technical Comparison Table

PropertyDark Slate BlueIolite

HEX#483D8B#5A4C8D

RGB72, 61, 13990, 76, 141

HSL248, 39, 39253, 30, 43

CMYK48, 56, 0, 4536, 46, 0, 45

FamilyBlueBlue

TemperatureCoolCool

ToneBalancedBalanced

Luminance0.06580.0927

Black contrast2.32:12.85:1

White contrast9.07:17.36:1

Shared tonesBalanced

Accessibility and Contrast

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

Dark Slate Bluewhite text - 9.07:1

Iolitewhite text - 7.36:1

Related Palette Strip

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

Dark Slate Blue#483D8B

Iolite#5A4C8D

#7267BC#7267BC

#8B7EB9#8B7EB9

#808A3D#808A3D

#808F4D#808F4D

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": "dark-slate-blue",
    "name": "Dark Slate Blue",
    "hex": "#483D8B",
    "rgb": [
      72,
      61,
      139
    ],
    "hsl": [
      248,
      39,
      39
    ],
    "cmyk": [
      48,
      56,
      0,
      45
    ],
    "family": "blue",
    "temperature": "cool",
    "tone": [
      "balanced"
    ],
    "luminance": 0.0658,
    "contrast": {
      "black": 2.32,
      "white": 9.07
    },
    "wcag": {
      "AA": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "AAA": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    },
    "bestText": {
      "text": "#FFFFFF",
      "label": "white text",
      "ratio": 9.07
    },
    "description": "Dark Slate Blue is #483D8B, a cool blue color with balanced character. Compared with Iolite, it is darker and more saturated. Use it for web design, css color systems, and ui prototyping, with white text as the safer foreground option.",
    "url": "https://www.colorsencyclopedia.com/colors/dark-slate-blue/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/dark-slate-blue.json"
  },
  {
    "slug": "iolite",
    "name": "Iolite",
    "hex": "#5A4C8D",
    "rgb": [
      90,
      76,
      141
    ],
    "hsl": [
      253,
      30,
      43
    ],
    "cmyk": [
      36,
      46,
      0,
      45
    ],
    "family": "blue",
    "temperature": "cool",
    "tone": [
      "balanced"
    ],
    "luminance": 0.0927,
    "contrast": {
      "black": 2.85,
      "white": 7.36
    },
    "wcag": {
      "AA": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "AAA": [
        "#FFFFFF"
      ]
    },
    "bestText": {
      "text": "#FFFFFF",
      "label": "white text",
      "ratio": 7.36
    },
    "description": "Iolite is #5A4C8D, a cool blue color with balanced character. Compared with Dark Slate Blue, it is lighter and less saturated. Use it for jewel-tone palettes, luxury branding, and premium interface accents, with white text as the safer foreground option.",
    "url": "https://www.colorsencyclopedia.com/colors/iolite/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/iolite.json"
  }
]

Differences

{
  "rgbDistance": 23.5,
  "contrastRatio": 1.23,
  "hslDelta": {
    "hue": 5,
    "saturation": 9,
    "lightness": 4
  },
  "luminanceDelta": 0.0269,
  "sameFamily": true,
  "sameTemperature": true,
  "sharedTones": [
    "balanced"
  ],
  "lighterColor": "Iolite",
  "moreSaturatedColor": "Dark Slate Blue"
}

Accessibility

{
  "pairContrastRatio": 1.23,
  "textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
  "safeText": [
    {
      "color": "Dark Slate Blue",
      "background": "#483D8B",
      "foreground": "#FFFFFF",
      "label": "white text",
      "ratio": 9.07
    },
    {
      "color": "Iolite",
      "background": "#5A4C8D",
      "foreground": "#FFFFFF",
      "label": "white text",
      "ratio": 7.36
    }
  ]
}

Use cases

{
  "chooseFirstWhen": "Dark Slate Blue is better when the design needs balanced blue character, cool temperature, and the specific HEX value #483D8B.",
  "chooseSecondWhen": "Iolite is better when the design needs balanced blue character, cool temperature, and the specific HEX value #5A4C8D.",
  "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/dark-slate-blue-vs-iolite.json",
  "https://www.colorsencyclopedia.com/api/colors/dark-slate-blue.json",
  "https://www.colorsencyclopedia.com/api/colors/iolite.json"
]

Full JSON dataset

{
  "datasetVersion": "1.0.0",
  "slug": "dark-slate-blue-vs-iolite",
  "type": "nearest",
  "name": "Dark Slate Blue vs Iolite",
  "verdict": "Dark Slate Blue and Iolite are very close colors. Iolite is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.23:1, so the pair is too low for text and better treated as a palette relationship.",
  "summary": "Dark Slate Blue and Iolite are different blue colors with HEX values #483D8B and #5A4C8D. According to Colors Encyclopedia, their RGB distance is 23.5, their contrast ratio is 1.23:1, and the comparison helps choose between tone, temperature, and accessibility behavior.",
  "rgbDistance": 23.5,
  "contrastRatio": 1.23,
  "colors": [
    {
      "slug": "dark-slate-blue",
      "name": "Dark Slate Blue",
      "hex": "#483D8B",
      "rgb": [
        72,
        61,
        139
      ],
      "hsl": [
        248,
        39,
        39
      ],
      "cmyk": [
        48,
        56,
        0,
        45
      ],
      "family": "blue",
      "temperature": "cool",
      "tone": [
        "balanced"
      ],
      "luminance": 0.0658,
      "contrast": {
        "black": 2.32,
        "white": 9.07
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      },
      "bestText": {
        "text": "#FFFFFF",
        "label": "white text",
        "ratio": 9.07
      },
      "description": "Dark Slate Blue is #483D8B, a cool blue color with balanced character. Compared with Iolite, it is darker and more saturated. Use it for web design, css color systems, and ui prototyping, with white text as the safer foreground option.",
      "url": "https://www.colorsencyclopedia.com/colors/dark-slate-blue/",
      "apiUrl": "https://www.colorsencyclopedia.com/api/colors/dark-slate-blue.json"
    },
    {
      "slug": "iolite",
      "name": "Iolite",
      "hex": "#5A4C8D",
      "rgb": [
        90,
        76,
        141
      ],
      "hsl": [
        253,
        30,
        43
      ],
      "cmyk": [
        36,
        46,
        0,
        45
      ],
      "family": "blue",
      "temperature": "cool",
      "tone": [
        "balanced"
      ],
      "luminance": 0.0927,
      "contrast": {
        "black": 2.85,
        "white": 7.36
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF"
        ]
      },
      "bestText": {
        "text": "#FFFFFF",
        "label": "white text",
        "ratio": 7.36
      },
      "description": "Iolite is #5A4C8D, a cool blue color with balanced character. Compared with Dark Slate Blue, it is lighter and less saturated. Use it for jewel-tone palettes, luxury branding, and premium interface accents, with white text as the safer foreground option.",
      "url": "https://www.colorsencyclopedia.com/colors/iolite/",
      "apiUrl": "https://www.colorsencyclopedia.com/api/colors/iolite.json"
    }
  ],
  "differences": {
    "rgbDistance": 23.5,
    "contrastRatio": 1.23,
    "hslDelta": {
      "hue": 5,
      "saturation": 9,
      "lightness": 4
    },
    "luminanceDelta": 0.0269,
    "sameFamily": true,
    "sameTemperature": true,
    "sharedTones": [
      "balanced"
    ],
    "lighterColor": "Iolite",
    "moreSaturatedColor": "Dark Slate Blue"
  },
  "accessibility": {
    "pairContrastRatio": 1.23,
    "textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
    "safeText": [
      {
        "color": "Dark Slate Blue",
        "background": "#483D8B",
        "foreground": "#FFFFFF",
        "label": "white text",
        "ratio": 9.07
      },
      {
        "color": "Iolite",
        "background": "#5A4C8D",
        "foreground": "#FFFFFF",
        "label": "white text",
        "ratio": 7.36
      }
    ]
  },
  "useCases": {
    "chooseFirstWhen": "Dark Slate Blue is better when the design needs balanced blue character, cool temperature, and the specific HEX value #483D8B.",
    "chooseSecondWhen": "Iolite is better when the design needs balanced blue character, cool temperature, and the specific HEX value #5A4C8D.",
    "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/dark-slate-blue-vs-iolite.json",
    "https://www.colorsencyclopedia.com/api/colors/dark-slate-blue.json",
    "https://www.colorsencyclopedia.com/api/colors/iolite.json"
  ],
  "url": "https://www.colorsencyclopedia.com/compare/dark-slate-blue-vs-iolite/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/compare/dark-slate-blue-vs-iolite.json"
}