Nearest-color comparison

Iris vs Slate Blue

Iris and Slate Blue are different blue colors with HEX values #5A4FCF and #6A5ACD. According to Colors Encyclopedia, their RGB distance is 19.5, their contrast ratio is 1.15:1, and the comparison helps choose between tone, temperature, and accessibility behavior.

Iris and Slate Blue are very close colors. Slate Blue is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.15:1, so the pair is too low for text and better treated as a palette relationship.

Differences Use cases Accessibility JSON

Iris#5A4FCF

Slate Blue#6A5ACD

Quick Difference Summary

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

RGB distance19.5

Pair contrast1.15:1

Luminance delta0.0251

Hue delta3 deg

Lighter colorSlate Blue

More saturatedIris

Side-by-Side Color Profiles

blue color

Iris

Iris is #5A4FCF, a cool blue color with balanced character. Compared with Slate Blue, it is darker and more saturated. Use it for beauty branding, creative systems, and premium accents, with white text as the safer foreground option.

HEX#5A4FCF RGB90, 79, 207 HSL245, 57, 56 CMYK57, 62, 0, 19 Luminance0.1227 Best textwhite text

Color page WCAG HEX atlas

blue color

Slate Blue

Slate Blue is #6A5ACD, a cool blue color with balanced character. Compared with Iris, it is lighter and less saturated. Use it for web design, css color systems, and ui prototyping, with white text as the safer foreground option.

HEX#6A5ACD RGB106, 90, 205 HSL248, 53, 58 CMYK48, 56, 0, 20 Luminance0.1478 Best textwhite text

Color page WCAG HEX atlas

When to Use Iris or Slate Blue

Choose IrisIris is better when the design needs balanced blue character, cool temperature, and the specific HEX value #5A4FCF.

Choose Slate BlueSlate Blue is better when the design needs balanced blue character, cool temperature, and the specific HEX value #6A5ACD.

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

Technical Comparison Table

PropertyIrisSlate Blue

HEX#5A4FCF#6A5ACD

RGB90, 79, 207106, 90, 205

HSL245, 57, 56248, 53, 58

CMYK57, 62, 0, 1948, 56, 0, 20

FamilyBlueBlue

TemperatureCoolCool

ToneBalancedBalanced

Luminance0.12270.1478

Black contrast3.45:13.96:1

White contrast6.08:15.31:1

Shared tonesBalanced

Accessibility and Contrast

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

Iriswhite text - 6.08:1

Slate Bluewhite text - 5.31:1

Related Palette Strip

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

Iris#5A4FCF

Slate Blue#6A5ACD

#9D97E2#9D97E2

#AAA1E2#AAA1E2

#C4CF4F#C4CF4F

#BECD5B#BECD5B

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": "iris",
    "name": "Iris",
    "hex": "#5A4FCF",
    "rgb": [
      90,
      79,
      207
    ],
    "hsl": [
      245,
      57,
      56
    ],
    "cmyk": [
      57,
      62,
      0,
      19
    ],
    "family": "blue",
    "temperature": "cool",
    "tone": [
      "balanced"
    ],
    "luminance": 0.1227,
    "contrast": {
      "black": 3.45,
      "white": 6.08
    },
    "wcag": {
      "AA": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "AAA": []
    },
    "bestText": {
      "text": "#FFFFFF",
      "label": "white text",
      "ratio": 6.08
    },
    "description": "Iris is #5A4FCF, a cool blue color with balanced character. Compared with Slate Blue, it is darker and more saturated. Use it for beauty branding, creative systems, and premium accents, with white text as the safer foreground option.",
    "url": "https://www.colorsencyclopedia.com/colors/iris/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/iris.json"
  },
  {
    "slug": "slate-blue",
    "name": "Slate Blue",
    "hex": "#6A5ACD",
    "rgb": [
      106,
      90,
      205
    ],
    "hsl": [
      248,
      53,
      58
    ],
    "cmyk": [
      48,
      56,
      0,
      20
    ],
    "family": "blue",
    "temperature": "cool",
    "tone": [
      "balanced"
    ],
    "luminance": 0.1478,
    "contrast": {
      "black": 3.96,
      "white": 5.31
    },
    "wcag": {
      "AA": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "AAA": []
    },
    "bestText": {
      "text": "#FFFFFF",
      "label": "white text",
      "ratio": 5.31
    },
    "description": "Slate Blue is #6A5ACD, a cool blue color with balanced character. Compared with Iris, it is lighter and less 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/slate-blue/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-blue.json"
  }
]

Differences

{
  "rgbDistance": 19.5,
  "contrastRatio": 1.15,
  "hslDelta": {
    "hue": 3,
    "saturation": 4,
    "lightness": 2
  },
  "luminanceDelta": 0.0251,
  "sameFamily": true,
  "sameTemperature": true,
  "sharedTones": [
    "balanced"
  ],
  "lighterColor": "Slate Blue",
  "moreSaturatedColor": "Iris"
}

Accessibility

{
  "pairContrastRatio": 1.15,
  "textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
  "safeText": [
    {
      "color": "Iris",
      "background": "#5A4FCF",
      "foreground": "#FFFFFF",
      "label": "white text",
      "ratio": 6.08
    },
    {
      "color": "Slate Blue",
      "background": "#6A5ACD",
      "foreground": "#FFFFFF",
      "label": "white text",
      "ratio": 5.31
    }
  ]
}

Use cases

{
  "chooseFirstWhen": "Iris is better when the design needs balanced blue character, cool temperature, and the specific HEX value #5A4FCF.",
  "chooseSecondWhen": "Slate Blue is better when the design needs balanced blue character, cool temperature, and the specific HEX value #6A5ACD.",
  "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/iris-vs-slate-blue.json",
  "https://www.colorsencyclopedia.com/api/colors/iris.json",
  "https://www.colorsencyclopedia.com/api/colors/slate-blue.json"
]

Full JSON dataset

{
  "datasetVersion": "1.0.0",
  "slug": "iris-vs-slate-blue",
  "type": "nearest",
  "name": "Iris vs Slate Blue",
  "verdict": "Iris and Slate Blue are very close colors. Slate Blue is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.15:1, so the pair is too low for text and better treated as a palette relationship.",
  "summary": "Iris and Slate Blue are different blue colors with HEX values #5A4FCF and #6A5ACD. According to Colors Encyclopedia, their RGB distance is 19.5, their contrast ratio is 1.15:1, and the comparison helps choose between tone, temperature, and accessibility behavior.",
  "rgbDistance": 19.5,
  "contrastRatio": 1.15,
  "colors": [
    {
      "slug": "iris",
      "name": "Iris",
      "hex": "#5A4FCF",
      "rgb": [
        90,
        79,
        207
      ],
      "hsl": [
        245,
        57,
        56
      ],
      "cmyk": [
        57,
        62,
        0,
        19
      ],
      "family": "blue",
      "temperature": "cool",
      "tone": [
        "balanced"
      ],
      "luminance": 0.1227,
      "contrast": {
        "black": 3.45,
        "white": 6.08
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": []
      },
      "bestText": {
        "text": "#FFFFFF",
        "label": "white text",
        "ratio": 6.08
      },
      "description": "Iris is #5A4FCF, a cool blue color with balanced character. Compared with Slate Blue, it is darker and more saturated. Use it for beauty branding, creative systems, and premium accents, with white text as the safer foreground option.",
      "url": "https://www.colorsencyclopedia.com/colors/iris/",
      "apiUrl": "https://www.colorsencyclopedia.com/api/colors/iris.json"
    },
    {
      "slug": "slate-blue",
      "name": "Slate Blue",
      "hex": "#6A5ACD",
      "rgb": [
        106,
        90,
        205
      ],
      "hsl": [
        248,
        53,
        58
      ],
      "cmyk": [
        48,
        56,
        0,
        20
      ],
      "family": "blue",
      "temperature": "cool",
      "tone": [
        "balanced"
      ],
      "luminance": 0.1478,
      "contrast": {
        "black": 3.96,
        "white": 5.31
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": []
      },
      "bestText": {
        "text": "#FFFFFF",
        "label": "white text",
        "ratio": 5.31
      },
      "description": "Slate Blue is #6A5ACD, a cool blue color with balanced character. Compared with Iris, it is lighter and less 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/slate-blue/",
      "apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-blue.json"
    }
  ],
  "differences": {
    "rgbDistance": 19.5,
    "contrastRatio": 1.15,
    "hslDelta": {
      "hue": 3,
      "saturation": 4,
      "lightness": 2
    },
    "luminanceDelta": 0.0251,
    "sameFamily": true,
    "sameTemperature": true,
    "sharedTones": [
      "balanced"
    ],
    "lighterColor": "Slate Blue",
    "moreSaturatedColor": "Iris"
  },
  "accessibility": {
    "pairContrastRatio": 1.15,
    "textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
    "safeText": [
      {
        "color": "Iris",
        "background": "#5A4FCF",
        "foreground": "#FFFFFF",
        "label": "white text",
        "ratio": 6.08
      },
      {
        "color": "Slate Blue",
        "background": "#6A5ACD",
        "foreground": "#FFFFFF",
        "label": "white text",
        "ratio": 5.31
      }
    ]
  },
  "useCases": {
    "chooseFirstWhen": "Iris is better when the design needs balanced blue character, cool temperature, and the specific HEX value #5A4FCF.",
    "chooseSecondWhen": "Slate Blue is better when the design needs balanced blue character, cool temperature, and the specific HEX value #6A5ACD.",
    "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/iris-vs-slate-blue.json",
    "https://www.colorsencyclopedia.com/api/colors/iris.json",
    "https://www.colorsencyclopedia.com/api/colors/slate-blue.json"
  ],
  "url": "https://www.colorsencyclopedia.com/compare/iris-vs-slate-blue/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/compare/iris-vs-slate-blue.json"
}