Nearest-color comparison

Amethyst Deep vs Rebecca Purple

Amethyst Deep and Rebecca Purple are different purple colors with HEX values #5D3A9B and #663399. According to Colors Encyclopedia, their RGB distance is 11.6, their contrast ratio is 1.02:1, and the comparison helps choose between tone, temperature, and accessibility behavior.

Amethyst Deep and Rebecca Purple are very close colors. Amethyst Deep is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.02:1, so the pair is too low for text and better treated as a palette relationship.

Differences Use cases Accessibility JSON

Amethyst Deep#5D3A9B

Rebecca Purple#663399

Quick Difference Summary

The main measurable differences between Amethyst Deep and Rebecca Purple across RGB distance, luminance, hue, saturation, and contrast.

RGB distance11.6

Pair contrast1.02:1

Luminance delta0.0023

Hue delta8 deg

Lighter colorAmethyst Deep

More saturatedRebecca Purple

Side-by-Side Color Profiles

purple color

Amethyst Deep

Amethyst Deep is #5D3A9B, a cool purple color with jewel tone character. Compared with Rebecca Purple, 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#5D3A9B RGB93, 58, 155 HSL262, 46, 42 CMYK40, 63, 0, 39 Luminance0.0772 Best textwhite text

Color page WCAG HEX atlas

purple color

Rebecca Purple

Rebecca Purple is #663399, a cool purple color with jewel tone character. Compared with Amethyst Deep, 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#663399 RGB102, 51, 153 HSL270, 50, 40 CMYK33, 67, 0, 40 Luminance0.0749 Best textwhite text

Color page WCAG HEX atlas

When to Use Amethyst Deep or Rebecca Purple

Choose Amethyst DeepAmethyst Deep is better when the design needs jewel tone purple character, cool temperature, and the specific HEX value #5D3A9B.

Choose Rebecca PurpleRebecca Purple is better when the design needs jewel tone purple character, cool temperature, and the specific HEX value #663399.

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

Technical Comparison Table

PropertyAmethyst DeepRebecca Purple

HEX#5D3A9B#663399

RGB93, 58, 155102, 51, 153

HSL262, 46, 42270, 50, 40

CMYK40, 63, 0, 3933, 67, 0, 40

FamilyPurplePurple

TemperatureCoolCool

ToneJewel ToneJewel Tone

Luminance0.07720.0749

Black contrast2.54:12.5:1

White contrast8.25:18.41:1

Shared tonesJewel Tone

Accessibility and Contrast

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

Amethyst Deepwhite text - 8.25:1

Rebecca Purplewhite text - 8.41:1

Related Palette Strip

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

Amethyst Deep#5D3A9B

Rebecca Purple#663399

#8C6AC8#8C6AC8

#945EC9#945EC9

#789C3A#789C3A

#669933#669933

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": "amethyst-deep",
    "name": "Amethyst Deep",
    "hex": "#5D3A9B",
    "rgb": [
      93,
      58,
      155
    ],
    "hsl": [
      262,
      46,
      42
    ],
    "cmyk": [
      40,
      63,
      0,
      39
    ],
    "family": "purple",
    "temperature": "cool",
    "tone": [
      "jewel-tone"
    ],
    "luminance": 0.0772,
    "contrast": {
      "black": 2.54,
      "white": 8.25
    },
    "wcag": {
      "AA": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "AAA": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    },
    "bestText": {
      "text": "#FFFFFF",
      "label": "white text",
      "ratio": 8.25
    },
    "description": "Amethyst Deep is #5D3A9B, a cool purple color with jewel tone character. Compared with Rebecca Purple, 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/amethyst-deep/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/amethyst-deep.json"
  },
  {
    "slug": "rebecca-purple",
    "name": "Rebecca Purple",
    "hex": "#663399",
    "rgb": [
      102,
      51,
      153
    ],
    "hsl": [
      270,
      50,
      40
    ],
    "cmyk": [
      33,
      67,
      0,
      40
    ],
    "family": "purple",
    "temperature": "cool",
    "tone": [
      "jewel-tone"
    ],
    "luminance": 0.0749,
    "contrast": {
      "black": 2.5,
      "white": 8.41
    },
    "wcag": {
      "AA": [
        "#FFFFFF",
        "#F5F5F5"
      ],
      "AAA": [
        "#FFFFFF",
        "#F5F5F5"
      ]
    },
    "bestText": {
      "text": "#FFFFFF",
      "label": "white text",
      "ratio": 8.41
    },
    "description": "Rebecca Purple is #663399, a cool purple color with jewel tone character. Compared with Amethyst Deep, 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/rebecca-purple/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/rebecca-purple.json"
  }
]

Differences

{
  "rgbDistance": 11.6,
  "contrastRatio": 1.02,
  "hslDelta": {
    "hue": 8,
    "saturation": 4,
    "lightness": 2
  },
  "luminanceDelta": 0.0023,
  "sameFamily": true,
  "sameTemperature": true,
  "sharedTones": [
    "jewel-tone"
  ],
  "lighterColor": "Amethyst Deep",
  "moreSaturatedColor": "Rebecca Purple"
}

Accessibility

{
  "pairContrastRatio": 1.02,
  "textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
  "safeText": [
    {
      "color": "Amethyst Deep",
      "background": "#5D3A9B",
      "foreground": "#FFFFFF",
      "label": "white text",
      "ratio": 8.25
    },
    {
      "color": "Rebecca Purple",
      "background": "#663399",
      "foreground": "#FFFFFF",
      "label": "white text",
      "ratio": 8.41
    }
  ]
}

Use cases

{
  "chooseFirstWhen": "Amethyst Deep is better when the design needs jewel tone purple character, cool temperature, and the specific HEX value #5D3A9B.",
  "chooseSecondWhen": "Rebecca Purple is better when the design needs jewel tone purple character, cool temperature, and the specific HEX value #663399.",
  "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/amethyst-deep-vs-rebecca-purple.json",
  "https://www.colorsencyclopedia.com/api/colors/amethyst-deep.json",
  "https://www.colorsencyclopedia.com/api/colors/rebecca-purple.json"
]

Full JSON dataset

{
  "datasetVersion": "1.0.0",
  "slug": "amethyst-deep-vs-rebecca-purple",
  "type": "nearest",
  "name": "Amethyst Deep vs Rebecca Purple",
  "verdict": "Amethyst Deep and Rebecca Purple are very close colors. Amethyst Deep is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.02:1, so the pair is too low for text and better treated as a palette relationship.",
  "summary": "Amethyst Deep and Rebecca Purple are different purple colors with HEX values #5D3A9B and #663399. According to Colors Encyclopedia, their RGB distance is 11.6, their contrast ratio is 1.02:1, and the comparison helps choose between tone, temperature, and accessibility behavior.",
  "rgbDistance": 11.6,
  "contrastRatio": 1.02,
  "colors": [
    {
      "slug": "amethyst-deep",
      "name": "Amethyst Deep",
      "hex": "#5D3A9B",
      "rgb": [
        93,
        58,
        155
      ],
      "hsl": [
        262,
        46,
        42
      ],
      "cmyk": [
        40,
        63,
        0,
        39
      ],
      "family": "purple",
      "temperature": "cool",
      "tone": [
        "jewel-tone"
      ],
      "luminance": 0.0772,
      "contrast": {
        "black": 2.54,
        "white": 8.25
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      },
      "bestText": {
        "text": "#FFFFFF",
        "label": "white text",
        "ratio": 8.25
      },
      "description": "Amethyst Deep is #5D3A9B, a cool purple color with jewel tone character. Compared with Rebecca Purple, 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/amethyst-deep/",
      "apiUrl": "https://www.colorsencyclopedia.com/api/colors/amethyst-deep.json"
    },
    {
      "slug": "rebecca-purple",
      "name": "Rebecca Purple",
      "hex": "#663399",
      "rgb": [
        102,
        51,
        153
      ],
      "hsl": [
        270,
        50,
        40
      ],
      "cmyk": [
        33,
        67,
        0,
        40
      ],
      "family": "purple",
      "temperature": "cool",
      "tone": [
        "jewel-tone"
      ],
      "luminance": 0.0749,
      "contrast": {
        "black": 2.5,
        "white": 8.41
      },
      "wcag": {
        "AA": [
          "#FFFFFF",
          "#F5F5F5"
        ],
        "AAA": [
          "#FFFFFF",
          "#F5F5F5"
        ]
      },
      "bestText": {
        "text": "#FFFFFF",
        "label": "white text",
        "ratio": 8.41
      },
      "description": "Rebecca Purple is #663399, a cool purple color with jewel tone character. Compared with Amethyst Deep, 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/rebecca-purple/",
      "apiUrl": "https://www.colorsencyclopedia.com/api/colors/rebecca-purple.json"
    }
  ],
  "differences": {
    "rgbDistance": 11.6,
    "contrastRatio": 1.02,
    "hslDelta": {
      "hue": 8,
      "saturation": 4,
      "lightness": 2
    },
    "luminanceDelta": 0.0023,
    "sameFamily": true,
    "sameTemperature": true,
    "sharedTones": [
      "jewel-tone"
    ],
    "lighterColor": "Amethyst Deep",
    "moreSaturatedColor": "Rebecca Purple"
  },
  "accessibility": {
    "pairContrastRatio": 1.02,
    "textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
    "safeText": [
      {
        "color": "Amethyst Deep",
        "background": "#5D3A9B",
        "foreground": "#FFFFFF",
        "label": "white text",
        "ratio": 8.25
      },
      {
        "color": "Rebecca Purple",
        "background": "#663399",
        "foreground": "#FFFFFF",
        "label": "white text",
        "ratio": 8.41
      }
    ]
  },
  "useCases": {
    "chooseFirstWhen": "Amethyst Deep is better when the design needs jewel tone purple character, cool temperature, and the specific HEX value #5D3A9B.",
    "chooseSecondWhen": "Rebecca Purple is better when the design needs jewel tone purple character, cool temperature, and the specific HEX value #663399.",
    "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/amethyst-deep-vs-rebecca-purple.json",
    "https://www.colorsencyclopedia.com/api/colors/amethyst-deep.json",
    "https://www.colorsencyclopedia.com/api/colors/rebecca-purple.json"
  ],
  "url": "https://www.colorsencyclopedia.com/compare/amethyst-deep-vs-rebecca-purple/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/compare/amethyst-deep-vs-rebecca-purple.json"
}