Nearest-color comparison

Tanzanite vs Iolite

Tanzanite and Iolite are different blue colors with HEX values #4D5DAB and #5A4C8D. According to Colors Encyclopedia, their RGB distance is 36.9, their contrast ratio is 1.22:1, and the comparison helps choose between tone, temperature, and accessibility behavior.

Tanzanite and Iolite are visually related colors. Tanzanite is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.22:1, so the pair is too low for text and better treated as a palette relationship.

Differences Use cases Accessibility JSON

Tanzanite#4D5DAB

Iolite#5A4C8D

Quick Difference Summary

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

RGB distance36.9

Pair contrast1.22:1

Luminance delta0.0308

Hue delta23 deg

Lighter colorTanzanite

More saturatedTanzanite

Side-by-Side Color Profiles

blue color

Tanzanite

Tanzanite is #4D5DAB, a cool blue color with balanced character. Compared with Iolite, it is lighter and more saturated. Use it for jewel-tone palettes, luxury branding, and premium interface accents, with white text as the safer foreground option.

HEX#4D5DAB RGB77, 93, 171 HSL230, 38, 49 CMYK55, 46, 0, 33 Luminance0.1235 Best textwhite text

Color page WCAG HEX atlas

blue color

Iolite

Iolite is #5A4C8D, a cool blue color with balanced character. Compared with Tanzanite, it is darker 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 Tanzanite or Iolite

Choose TanzaniteTanzanite is better when the design needs balanced blue character, cool temperature, and the specific HEX value #4D5DAB.

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

PropertyTanzaniteIolite

HEX#4D5DAB#5A4C8D

RGB77, 93, 17190, 76, 141

HSL230, 38, 49253, 30, 43

CMYK55, 46, 0, 3336, 46, 0, 45

FamilyBlueBlue

TemperatureCoolCool

ToneBalancedBalanced

Luminance0.12350.0927

Black contrast3.47:12.85:1

White contrast6.05:17.36:1

Shared tonesBalanced

Accessibility and Contrast

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

Tanzanitewhite text - 6.05:1

Iolitewhite text - 7.36:1

Related Palette Strip

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

Tanzanite#4D5DAB

Iolite#5A4C8D

#8B96CB#8B96CB

#8B7EB9#8B7EB9

#AC9D4D#AC9D4D

#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": "tanzanite",
    "name": "Tanzanite",
    "hex": "#4D5DAB",
    "rgb": [
      77,
      93,
      171
    ],
    "hsl": [
      230,
      38,
      49
    ],
    "cmyk": [
      55,
      46,
      0,
      33
    ],
    "family": "blue",
    "temperature": "cool",
    "tone": [
      "balanced"
    ],
    "luminance": 0.1235,
    "contrast": {
      "black": 3.47,
      "white": 6.05
    },
    "wcag": {
      "AA": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "AAA": []
    },
    "bestText": {
      "text": "#FFFFFF",
      "label": "white text",
      "ratio": 6.05
    },
    "description": "Tanzanite is #4D5DAB, a cool blue color with balanced character. Compared with Iolite, it is lighter and more 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/tanzanite/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/tanzanite.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 Tanzanite, it is darker 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": 36.9,
  "contrastRatio": 1.22,
  "hslDelta": {
    "hue": 23,
    "saturation": 8,
    "lightness": 6
  },
  "luminanceDelta": 0.0308,
  "sameFamily": true,
  "sameTemperature": true,
  "sharedTones": [
    "balanced"
  ],
  "lighterColor": "Tanzanite",
  "moreSaturatedColor": "Tanzanite"
}

Accessibility

{
  "pairContrastRatio": 1.22,
  "textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
  "safeText": [
    {
      "color": "Tanzanite",
      "background": "#4D5DAB",
      "foreground": "#FFFFFF",
      "label": "white text",
      "ratio": 6.05
    },
    {
      "color": "Iolite",
      "background": "#5A4C8D",
      "foreground": "#FFFFFF",
      "label": "white text",
      "ratio": 7.36
    }
  ]
}

Use cases

{
  "chooseFirstWhen": "Tanzanite is better when the design needs balanced blue character, cool temperature, and the specific HEX value #4D5DAB.",
  "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/tanzanite-vs-iolite.json",
  "https://www.colorsencyclopedia.com/api/colors/tanzanite.json",
  "https://www.colorsencyclopedia.com/api/colors/iolite.json"
]

Full JSON dataset

{
  "datasetVersion": "1.0.0",
  "slug": "tanzanite-vs-iolite",
  "type": "nearest",
  "name": "Tanzanite vs Iolite",
  "verdict": "Tanzanite and Iolite are visually related colors. Tanzanite is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.22:1, so the pair is too low for text and better treated as a palette relationship.",
  "summary": "Tanzanite and Iolite are different blue colors with HEX values #4D5DAB and #5A4C8D. According to Colors Encyclopedia, their RGB distance is 36.9, their contrast ratio is 1.22:1, and the comparison helps choose between tone, temperature, and accessibility behavior.",
  "rgbDistance": 36.9,
  "contrastRatio": 1.22,
  "colors": [
    {
      "slug": "tanzanite",
      "name": "Tanzanite",
      "hex": "#4D5DAB",
      "rgb": [
        77,
        93,
        171
      ],
      "hsl": [
        230,
        38,
        49
      ],
      "cmyk": [
        55,
        46,
        0,
        33
      ],
      "family": "blue",
      "temperature": "cool",
      "tone": [
        "balanced"
      ],
      "luminance": 0.1235,
      "contrast": {
        "black": 3.47,
        "white": 6.05
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": []
      },
      "bestText": {
        "text": "#FFFFFF",
        "label": "white text",
        "ratio": 6.05
      },
      "description": "Tanzanite is #4D5DAB, a cool blue color with balanced character. Compared with Iolite, it is lighter and more 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/tanzanite/",
      "apiUrl": "https://www.colorsencyclopedia.com/api/colors/tanzanite.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 Tanzanite, it is darker 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": 36.9,
    "contrastRatio": 1.22,
    "hslDelta": {
      "hue": 23,
      "saturation": 8,
      "lightness": 6
    },
    "luminanceDelta": 0.0308,
    "sameFamily": true,
    "sameTemperature": true,
    "sharedTones": [
      "balanced"
    ],
    "lighterColor": "Tanzanite",
    "moreSaturatedColor": "Tanzanite"
  },
  "accessibility": {
    "pairContrastRatio": 1.22,
    "textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
    "safeText": [
      {
        "color": "Tanzanite",
        "background": "#4D5DAB",
        "foreground": "#FFFFFF",
        "label": "white text",
        "ratio": 6.05
      },
      {
        "color": "Iolite",
        "background": "#5A4C8D",
        "foreground": "#FFFFFF",
        "label": "white text",
        "ratio": 7.36
      }
    ]
  },
  "useCases": {
    "chooseFirstWhen": "Tanzanite is better when the design needs balanced blue character, cool temperature, and the specific HEX value #4D5DAB.",
    "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/tanzanite-vs-iolite.json",
    "https://www.colorsencyclopedia.com/api/colors/tanzanite.json",
    "https://www.colorsencyclopedia.com/api/colors/iolite.json"
  ],
  "url": "https://www.colorsencyclopedia.com/compare/tanzanite-vs-iolite/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/compare/tanzanite-vs-iolite.json"
}