Colors Encyclopedia

Named color

Dark Slate Blue

Dark Slate Blue color #483D8B: RGB 72, 61, 139 and HSL 248°, 39%, 39%. Explore its cool blue profile, contrast, CSS, palettes and harmonies.

#483D8B blue cool balanced
HEX #483D8B
RGB rgb(72, 61, 139)
HSL hsl(248 39% 39%)
CMYK cmyk(48, 56, 0, 45)
Luminance 0.0658
Contrast Black 2.32:1White 9.07:1

Use this color

Create with Dark Slate Blue

Open a professional color tool with #483D8B already applied. Each configuration stays canonical to the tool and can be adjusted or shared.

All color tools
Generate palette & CSS variablesCreate 50–950 tokens and export CSS, SCSS, JSON, or Tailwind.Open configured tool →Open in Gradient StudioStart with Dark Slate Blue and its complementary color.Open configured tool →Mix this colorBlend it with a complementary color and copy color-mix() CSS.Open configured tool →Check contrastOpen the strongest black or white background pairing.Open configured tool →Accessible combinationsReview AA and AAA text options, alternatives, warnings, and UI guidance.Open configured tool →Create glass surfaceUse this color as the tint for a translucent UI panel.Open configured tool →

CSS Utilities

--color-dark-slate-blue: #483D8B;
.bg-dark-slate-blue { background-color: #483D8B; }
.text-dark-slate-blue { color: #483D8B; }
Open CSS utility pageReusable variables, classes, examples, and implementation notes

Color meaning and use

About Dark Slate Blue Color

Dark Slate Blue uses HEX #483D8B, RGB 72, 61, 139, and HSL 248°, 39%, 39%. The dataset classifies it in the blue family with cool temperature and balanced visual character.

No separate named-color neighbor is recorded for this entry. Its relative luminance is 0.0658; black contrast is 2.32:1 and white contrast is 9.07:1, making white the stronger of those two standard foreground choices.

WCAG Accessibility

Contrast checks for Dark Slate Blue against black and white text.

Black text2.32:1AA Fail
White text9.07:1AA Pass
AA text options#FFFFFF, #F5F5F5
AAA text options#FFFFFF, #F5F5F5
Open WCAG pageDetailed contrast notes, warnings, alternatives, and UI examples

Downloadable color reference infographic

Dark Slate Blue Color Reference Infographic

Save a high-resolution infographic of Dark Slate Blue, including its color values, coordinated palette, and black and white text contrast.

1200 × 800
Dark Slate Blue color reference infographic showing #483D8B, RGB and HSL values, a coordinated palette, and black and white text contrast.
Dark Slate Blue color reference infographic generated from the verified Colors Encyclopedia dataset.
Download WebPDownload SVGOpen full size

Color Harmonies

#808A3D#808A3D#3D598A#3D598A#6E3D8A#6E3D8A#8A473D#8A473D#3D8A47#3D8A47
Open full Dark Slate Blue harmony pageComplementary, analogous, triadic, tetradic, split, and monochromatic sets

Variants

#7267BC#7267BC#26214A#26214A#3727A0#3727A0#575374#575374#938DB9#938DB9#2000F0#2000F0

Pairings

White#FFFFFF#808A3D#808A3D#3D598A#3D598A#6E3D8A#6E3D8AMatte Black#1A1A1AWhite Smoke#F5F5F5

Machine-readable data

Machine-Readable Color Data (JSON)

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

AI-Ready Dataset v1.0.0
Luminance0.0658
Black text2.32:1AA Fail
White text9.07:1AA 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": "#483D8B",
  "rgb": [
    72,
    61,
    139
  ],
  "hsl": [
    248,
    39,
    39
  ],
  "cmyk": [
    48,
    56,
    0,
    45
  ],
  "luminance": 0.0658,
  "contrast": {
    "black": 2.32,
    "white": 9.07
  }
}
WCAG
{
  "AA": [
    "#FFFFFF",
    "#F5F5F5"
  ],
  "AAA": [
    "#FFFFFF",
    "#F5F5F5"
  ]
}
Harmonies
{
  "complementary": "#808A3D",
  "analogous": [
    "#3D598A",
    "#6E3D8A"
  ],
  "triadic": [
    "#8A473D",
    "#3D8A47"
  ],
  "tetradic": [
    "#8A3D59",
    "#808A3D",
    "#3D8A6E"
  ],
  "splitComplementary": [
    "#8A6E3D",
    "#598A3D"
  ],
  "monochromatic": [
    "#7267BC",
    "#483D8B",
    "#26214A"
  ]
}
Variants
{
  "light": "#7267BC",
  "dark": "#26214A",
  "saturated": "#3727A0",
  "desaturated": "#575374",
  "pastel": "#938DB9",
  "neon": "#2000F0"
}
Pairings
{
  "best": [
    "#FFFFFF",
    "#808A3D",
    "#3D598A",
    "#6E3D8A"
  ],
  "avoid": [
    "#575374",
    "#7267BC"
  ],
  "neutral": [
    "#1A1A1A",
    "#F5F5F5",
    "#E8E8E4"
  ],
  "highContrast": [
    "#FFFFFF"
  ],
  "lowContrast": [
    "#7267BC",
    "#575374"
  ]
}
Knowledge graph
{
  "nearestColors": [
    "iolite",
    "amethyst-deep",
    "rebecca-purple",
    "imperial-purple",
    "tanzanite"
  ],
  "generatedPalettes": [
    "dark-slate-blue"
  ],
  "generatedComparisons": [
    "dark-slate-blue-vs-amethyst-deep",
    "dark-slate-blue-vs-iolite"
  ],
  "relatedFamilies": [
    "/colors/by-family/blue",
    "/colors/by-temperature/cool",
    "/colors/by-tone/balanced"
  ],
  "relatedTools": [
    "/harmonies/dark-slate-blue",
    "/wcag/dark-slate-blue",
    "/css/colors/dark-slate-blue",
    "/hex/483d8b",
    "/tools/css-gradient-generator",
    "/tools/color-palette-generator",
    "/tools/css-color-mixer",
    "/tools/contrast-checker"
  ],
  "semanticRelations": {
    "broader": [
      "/colors/by-family/blue",
      "/colors/by-temperature/cool",
      "/colors/by-tone/balanced"
    ],
    "narrower": [
      "/palettes/dark-slate-blue"
    ],
    "related": [
      "/colors/iolite",
      "/colors/amethyst-deep",
      "/colors/rebecca-purple",
      "/colors/imperial-purple",
      "/colors/tanzanite",
      "/compare/dark-slate-blue-vs-amethyst-deep",
      "/compare/dark-slate-blue-vs-iolite",
      "/harmonies/dark-slate-blue",
      "/wcag/dark-slate-blue",
      "/css/colors/dark-slate-blue",
      "/hex/483d8b",
      "/tools/css-gradient-generator",
      "/tools/color-palette-generator",
      "/tools/css-color-mixer",
      "/tools/contrast-checker"
    ]
  }
}
Full JSON dataset 
{
  "slug": "dark-slate-blue",
  "name": "Dark Slate Blue",
  "cssName": "darkslateblue",
  "hex": "#483D8B",
  "family": "blue",
  "temperature": "cool",
  "tone": [
    "balanced"
  ],
  "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": [
    "darkslateblue"
  ],
  "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": [
    "blue",
    "cool",
    "balanced",
    "web-design",
    "css-color-systems",
    "ui-prototyping",
    "context-dependent"
  ],
  "popularity": 63,
  "rgb": [
    72,
    61,
    139
  ],
  "hsl": [
    248,
    39,
    39
  ],
  "cmyk": [
    48,
    56,
    0,
    45
  ],
  "luminance": 0.0658,
  "contrast": {
    "black": 2.32,
    "white": 9.07
  },
  "harmonies": {
    "complementary": "#808A3D",
    "analogous": [
      "#3D598A",
      "#6E3D8A"
    ],
    "triadic": [
      "#8A473D",
      "#3D8A47"
    ],
    "tetradic": [
      "#8A3D59",
      "#808A3D",
      "#3D8A6E"
    ],
    "splitComplementary": [
      "#8A6E3D",
      "#598A3D"
    ],
    "monochromatic": [
      "#7267BC",
      "#483D8B",
      "#26214A"
    ]
  },
  "variants": {
    "light": "#7267BC",
    "dark": "#26214A",
    "saturated": "#3727A0",
    "desaturated": "#575374",
    "pastel": "#938DB9",
    "neon": "#2000F0"
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  "css": {
    "variable": "--color-dark-slate-blue: #483D8B;",
    "utility": ".bg-dark-slate-blue { background-color: #483D8B; }",
    "textUtility": ".text-dark-slate-blue { color: #483D8B; }"
  },
  "nearestColors": [
    "iolite",
    "amethyst-deep",
    "rebecca-purple",
    "imperial-purple",
    "tanzanite"
  ],
  "generatedPalettes": [
    "dark-slate-blue"
  ],
  "generatedComparisons": [
    "dark-slate-blue-vs-amethyst-deep",
    "dark-slate-blue-vs-iolite"
  ],
  "relatedFamilies": [
    "/colors/by-family/blue",
    "/colors/by-temperature/cool",
    "/colors/by-tone/balanced"
  ],
  "relatedTools": [
    "/harmonies/dark-slate-blue",
    "/wcag/dark-slate-blue",
    "/css/colors/dark-slate-blue",
    "/hex/483d8b",
    "/tools/css-gradient-generator",
    "/tools/color-palette-generator",
    "/tools/css-color-mixer",
    "/tools/contrast-checker"
  ],
  "semanticRelations": {
    "broader": [
      "/colors/by-family/blue",
      "/colors/by-temperature/cool",
      "/colors/by-tone/balanced"
    ],
    "narrower": [
      "/palettes/dark-slate-blue"
    ],
    "related": [
      "/colors/iolite",
      "/colors/amethyst-deep",
      "/colors/rebecca-purple",
      "/colors/imperial-purple",
      "/colors/tanzanite",
      "/compare/dark-slate-blue-vs-amethyst-deep",
      "/compare/dark-slate-blue-vs-iolite",
      "/harmonies/dark-slate-blue",
      "/wcag/dark-slate-blue",
      "/css/colors/dark-slate-blue",
      "/hex/483d8b",
      "/tools/css-gradient-generator",
      "/tools/color-palette-generator",
      "/tools/css-color-mixer",
      "/tools/contrast-checker"
    ]
  },
  "pairings": {
    "best": [
      "#FFFFFF",
      "#808A3D",
      "#3D598A",
      "#6E3D8A"
    ],
    "avoid": [
      "#575374",
      "#7267BC"
    ],
    "neutral": [
      "#1A1A1A",
      "#F5F5F5",
      "#E8E8E4"
    ],
    "highContrast": [
      "#FFFFFF"
    ],
    "lowContrast": [
      "#7267BC",
      "#575374"
    ]
  }
}
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

Similar Colors

Iolite#5A4C8D
Amethyst Deep#5D3A9B
Rebecca Purple#663399
Imperial Purple#602F6B
Tanzanite#4D5DAB

Related Color Guides

Blue color familyBrowse named blue colors and compare nearby swatches.Cool colorsExplore colors with cool temperature behavior.Balanced colorsFind colors with balanced visual character.Dark Slate Blue accessibilityCheck contrast and WCAG text options for #483D8B.Dark Slate Blue CSS utilitiesUse Dark Slate Blue in CSS variables and utility classes.#483D8B HEX atlasOpen the permanent HEX atlas record for conversions and variants.Dark Slate Blue paletteOpen the generated palette based on Dark Slate Blue.Dark Slate Blue harmoniesExplore complementary, analogous, triadic, and tetradic harmonies.