Colors Encyclopedia

Named color

Rebecca Purple

Rebecca Purple is a jewel tone purple color with HEX #663399. According to Colors Encyclopedia, it has RGB 102, 51, 153, HSL 270, 50%, 40%, cool temperature, and is useful for web design, CSS color systems, and UI prototyping.

#663399 purple cool jewel-tone
HEX #663399
RGB rgb(102, 51, 153)
HSL hsl(270 50% 40%)
CMYK cmyk(33, 67, 0, 40)
Luminance 0.0749
Contrast Black 2.5:1White 8.41:1

CSS Utilities

--color-rebecca-purple: #663399;
.bg-rebecca-purple { background-color: #663399; }
.text-rebecca-purple { color: #663399; }
Open CSS utility pageReusable variables, classes, examples, and implementation notes

Machine-readable data

Machine-Readable Color Data (JSON)

Perfect for CSS, design systems, automation, and AI ingestion.

AI-Ready Dataset v1.0.0
Luminance0.0749
Black text2.5:1AA Fail
White text8.41:1AA Pass
hexCanonical HEX value
rgbRed, green, blue channels
hslHue, saturation, lightness
cmykApproximate print conversion
wcagAA and AAA contrast options
harmoniesMathematical harmony sets
variantsGenerated tone variants
nearestColorsKnowledge graph neighbors
Download JSON Open API
Structured sections
Color systems
{
  "hex": "#663399",
  "rgb": [
    102,
    51,
    153
  ],
  "hsl": [
    270,
    50,
    40
  ],
  "cmyk": [
    33,
    67,
    0,
    40
  ],
  "luminance": 0.0749,
  "contrast": {
    "black": 2.5,
    "white": 8.41
  }
}
WCAG
{
  "AA": [
    "#FFFFFF",
    "#F5F5F5"
  ],
  "AAA": [
    "#FFFFFF",
    "#F5F5F5"
  ]
}
Harmonies
{
  "complementary": "#669933",
  "analogous": [
    "#333399",
    "#993399"
  ],
  "triadic": [
    "#996633",
    "#339966"
  ],
  "tetradic": [
    "#993333",
    "#669933",
    "#339999"
  ],
  "splitComplementary": [
    "#999933",
    "#339933"
  ],
  "monochromatic": [
    "#945EC9",
    "#663399",
    "#381C54"
  ]
}
Variants
{
  "light": "#945EC9",
  "dark": "#381C54",
  "saturated": "#661DAF",
  "desaturated": "#664983",
  "pastel": "#A687C5",
  "neon": "#7A00F5"
}
Pairings
{
  "best": [
    "#FFFFFF",
    "#669933",
    "#333399",
    "#993399"
  ],
  "avoid": [
    "#664983",
    "#945EC9"
  ],
  "neutral": [
    "#1A1A1A",
    "#F5F5F5",
    "#E8E8E4"
  ],
  "highContrast": [
    "#FFFFFF"
  ],
  "lowContrast": [
    "#945EC9",
    "#664983"
  ]
}
Knowledge graph
{
  "nearestColors": [
    "amethyst-deep",
    "grape",
    "iolite",
    "dark-slate-blue",
    "royal-purple"
  ],
  "generatedPalettes": [
    "rebecca-purple"
  ],
  "generatedComparisons": [
    "amethyst-deep-vs-rebecca-purple",
    "grape-vs-rebecca-purple",
    "plum-purple-vs-rebecca-purple"
  ],
  "relatedFamilies": [
    "/colors/by-family/purple",
    "/colors/by-temperature/cool",
    "/colors/by-tone/jewel-tone"
  ],
  "relatedTools": [
    "/harmonies/rebecca-purple",
    "/wcag/rebecca-purple",
    "/css/colors/rebecca-purple",
    "/hex/663399"
  ],
  "semanticRelations": {
    "broader": [
      "/colors/by-family/purple",
      "/colors/by-temperature/cool",
      "/colors/by-tone/jewel-tone"
    ],
    "narrower": [
      "/palettes/rebecca-purple"
    ],
    "related": [
      "/colors/amethyst-deep",
      "/colors/grape",
      "/colors/iolite",
      "/colors/dark-slate-blue",
      "/colors/royal-purple",
      "/compare/amethyst-deep-vs-rebecca-purple",
      "/compare/grape-vs-rebecca-purple",
      "/compare/plum-purple-vs-rebecca-purple",
      "/harmonies/rebecca-purple",
      "/wcag/rebecca-purple",
      "/css/colors/rebecca-purple",
      "/hex/663399"
    ]
  }
}
Full JSON dataset 
{
  "slug": "rebecca-purple",
  "name": "Rebecca Purple",
  "cssName": "rebeccapurple",
  "hex": "#663399",
  "family": "purple",
  "temperature": "cool",
  "tone": [
    "jewel-tone"
  ],
  "uses": [
    "web design",
    "CSS color systems",
    "UI prototyping"
  ],
  "psychology": {
    "associations": [
      "context dependent"
    ],
    "contexts": [
      "web interfaces",
      "design systems",
      "technical color references"
    ],
    "avoidIn": [
      "claims that require brand or cultural specificity"
    ]
  },
  "aliases": [
    "rebeccapurple"
  ],
  "sourceType": "standard",
  "confidence": "high",
  "sourceUrl": "https://www.w3.org/TR/css-color-4/#named-colors",
  "origin": {
    "type": "css",
    "notes": "Standard CSS named color."
  },
  "reviewStatus": "auto",
  "editorialNotes": "Generated from CSS named color data and computed color-system properties.",
  "tags": [
    "purple",
    "cool",
    "jewel-tone",
    "web-design",
    "css-color-systems",
    "ui-prototyping",
    "context-dependent"
  ],
  "popularity": 67,
  "rgb": [
    102,
    51,
    153
  ],
  "hsl": [
    270,
    50,
    40
  ],
  "cmyk": [
    33,
    67,
    0,
    40
  ],
  "luminance": 0.0749,
  "contrast": {
    "black": 2.5,
    "white": 8.41
  },
  "harmonies": {
    "complementary": "#669933",
    "analogous": [
      "#333399",
      "#993399"
    ],
    "triadic": [
      "#996633",
      "#339966"
    ],
    "tetradic": [
      "#993333",
      "#669933",
      "#339999"
    ],
    "splitComplementary": [
      "#999933",
      "#339933"
    ],
    "monochromatic": [
      "#945EC9",
      "#663399",
      "#381C54"
    ]
  },
  "variants": {
    "light": "#945EC9",
    "dark": "#381C54",
    "saturated": "#661DAF",
    "desaturated": "#664983",
    "pastel": "#A687C5",
    "neon": "#7A00F5"
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  "css": {
    "variable": "--color-rebecca-purple: #663399;",
    "utility": ".bg-rebecca-purple { background-color: #663399; }",
    "textUtility": ".text-rebecca-purple { color: #663399; }"
  },
  "nearestColors": [
    "amethyst-deep",
    "grape",
    "iolite",
    "dark-slate-blue",
    "royal-purple"
  ],
  "generatedPalettes": [
    "rebecca-purple"
  ],
  "generatedComparisons": [
    "amethyst-deep-vs-rebecca-purple",
    "grape-vs-rebecca-purple",
    "plum-purple-vs-rebecca-purple"
  ],
  "relatedFamilies": [
    "/colors/by-family/purple",
    "/colors/by-temperature/cool",
    "/colors/by-tone/jewel-tone"
  ],
  "relatedTools": [
    "/harmonies/rebecca-purple",
    "/wcag/rebecca-purple",
    "/css/colors/rebecca-purple",
    "/hex/663399"
  ],
  "semanticRelations": {
    "broader": [
      "/colors/by-family/purple",
      "/colors/by-temperature/cool",
      "/colors/by-tone/jewel-tone"
    ],
    "narrower": [
      "/palettes/rebecca-purple"
    ],
    "related": [
      "/colors/amethyst-deep",
      "/colors/grape",
      "/colors/iolite",
      "/colors/dark-slate-blue",
      "/colors/royal-purple",
      "/compare/amethyst-deep-vs-rebecca-purple",
      "/compare/grape-vs-rebecca-purple",
      "/compare/plum-purple-vs-rebecca-purple",
      "/harmonies/rebecca-purple",
      "/wcag/rebecca-purple",
      "/css/colors/rebecca-purple",
      "/hex/663399"
    ]
  },
  "pairings": {
    "best": [
      "#FFFFFF",
      "#669933",
      "#333399",
      "#993399"
    ],
    "avoid": [
      "#664983",
      "#945EC9"
    ],
    "neutral": [
      "#1A1A1A",
      "#F5F5F5",
      "#E8E8E4"
    ],
    "highContrast": [
      "#FFFFFF"
    ],
    "lowContrast": [
      "#945EC9",
      "#664983"
    ]
  }
}
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

Color meaning and use

About Rebecca Purple Color

Rebecca Purple sits in the purple family with cool temperature and jewel tone visual character. Standard CSS named color.

Its common associations include context dependent, which makes it relevant for web interfaces and design systems. In design work, Rebecca Purple is most useful for web design, css color systems, and ui prototyping, especially when paired with white text for stronger contrast.

Related Color Guides

Purple color familyBrowse named purple colors and compare nearby swatches.Cool colorsExplore colors with cool temperature behavior.Jewel Tone colorsFind colors with jewel tone visual character.Rebecca Purple accessibilityCheck contrast and WCAG text options for #663399.Rebecca Purple CSS utilitiesUse Rebecca Purple in CSS variables and utility classes.#663399 HEX atlasOpen the permanent HEX atlas record for conversions and variants.Rebecca Purple paletteOpen the generated palette based on Rebecca Purple.Rebecca Purple harmoniesExplore complementary, analogous, triadic, and tetradic harmonies.

WCAG Accessibility

Contrast checks for Rebecca Purple against black and white text.

Black text2.5:1AA Fail
White text8.41:1AA Pass
AA text options#FFFFFF, #F5F5F5
AAA text options#FFFFFF, #F5F5F5
Open WCAG pageDetailed contrast notes, warnings, alternatives, and UI examples

Similar Colors

Amethyst Deep#5D3A9B
Grape#6F2DA8
Iolite#5A4C8D
Dark Slate Blue#483D8B
Royal Purple#7851A9

Color Harmonies

#669933#669933
#333399#333399
#993399#993399
#996633#996633
#339966#339966
Open full Rebecca Purple harmony pageComplementary, analogous, triadic, tetradic, split, and monochromatic sets

Variants

#945EC9#945EC9
#381C54#381C54
#661DAF#661DAF
#664983#664983
#A687C5#A687C5
#7A00F5#7A00F5

Pairings

White#FFFFFF
#669933#669933
#333399#333399
#993399#993399
Matte Black#1A1A1A
White Smoke#F5F5F5