Colors Encyclopedia

Named color

Slate Blue

Slate Blue color #6A5ACD: RGB 106, 90, 205 and HSL 248°, 53%, 58%. Explore its cool blue profile, contrast, CSS, palettes and harmonies.

#6A5ACD blue cool balanced
HEX #6A5ACD
RGB rgb(106, 90, 205)
HSL hsl(248 53% 58%)
CMYK cmyk(48, 56, 0, 20)
Luminance 0.1478
Contrast Black 3.96:1White 5.31:1

Use this color

Create with Slate Blue

Open a professional color tool with #6A5ACD 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 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-slate-blue: #6A5ACD;
.bg-slate-blue { background-color: #6A5ACD; }
.text-slate-blue { color: #6A5ACD; }
Open CSS utility pageReusable variables, classes, examples, and implementation notes

Color meaning and use

About Slate Blue Color

Slate Blue uses HEX #6A5ACD, RGB 106, 90, 205, and HSL 248°, 53%, 58%. 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 0.1478; black contrast is 3.96:1 and white contrast is 5.31:1, making white the stronger of those two standard foreground choices.

WCAG Accessibility

Contrast checks for Slate Blue against black and white text.

Black text3.96:1AA Fail
White text5.31:1AA Pass
AA text options#FFFFFF, #F5F5F5
AAA text optionsNone in seed set
Open WCAG pageDetailed contrast notes, warnings, alternatives, and UI examples

Downloadable color reference infographic

Slate Blue Color Reference Infographic

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

1200 × 800
Slate Blue color reference infographic showing #6A5ACD, RGB and HSL values, a coordinated palette, and black and white text contrast.
Slate Blue color reference infographic generated from the verified Colors Encyclopedia dataset.
Download WebPDownload SVGOpen full size

Color Harmonies

#BECD5B#BECD5B#5B85CD#5B85CD#A35BCD#A35BCD#CD6A5B#CD6A5B#5BCD6A#5BCD6A
Open full Slate Blue harmony pageComplementary, analogous, triadic, tetradic, split, and monochromatic sets

Variants

#AAA1E2#AAA1E2#3E309C#3E309C#5944E4#5944E4#7C73B5#7C73B5#C8C3E4#C8C3E4#6952FF#6952FF

Pairings

White#FFFFFF#BECD5B#BECD5B#5B85CD#5B85CD#A35BCD#A35BCDMatte 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
Luminance0.1478
Black text3.96:1AA Fail
White text5.31:1AA 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": "#6A5ACD",
  "rgb": [
    106,
    90,
    205
  ],
  "hsl": [
    248,
    53,
    58
  ],
  "cmyk": [
    48,
    56,
    0,
    20
  ],
  "luminance": 0.1478,
  "contrast": {
    "black": 3.96,
    "white": 5.31
  }
}
WCAG
{
  "AA": [
    "#FFFFFF",
    "#F5F5F5"
  ],
  "AAA": []
}
Harmonies
{
  "complementary": "#BECD5B",
  "analogous": [
    "#5B85CD",
    "#A35BCD"
  ],
  "triadic": [
    "#CD6A5B",
    "#5BCD6A"
  ],
  "tetradic": [
    "#CD5B85",
    "#BECD5B",
    "#5BCDA3"
  ],
  "splitComplementary": [
    "#CDA35B",
    "#85CD5B"
  ],
  "monochromatic": [
    "#AAA1E2",
    "#6A5ACD",
    "#3E309C"
  ]
}
Variants
{
  "light": "#AAA1E2",
  "dark": "#3E309C",
  "saturated": "#5944E4",
  "desaturated": "#7C73B5",
  "pastel": "#C8C3E4",
  "neon": "#6952FF"
}
Pairings
{
  "best": [
    "#FFFFFF",
    "#BECD5B",
    "#5B85CD",
    "#A35BCD"
  ],
  "avoid": [
    "#7C73B5",
    "#AAA1E2"
  ],
  "neutral": [
    "#1A1A1A",
    "#F5F5F5",
    "#E8E8E4"
  ],
  "highContrast": [
    "#FFFFFF"
  ],
  "lowContrast": [
    "#AAA1E2",
    "#7C73B5"
  ]
}
Knowledge graph
{
  "nearestColors": [
    "iris",
    "royal-purple",
    "medium-slate-blue",
    "tanzanite",
    "royal-blue"
  ],
  "generatedPalettes": [
    "slate-blue"
  ],
  "generatedComparisons": [
    "iris-vs-slate-blue",
    "medium-slate-blue-vs-slate-blue",
    "royal-blue-vs-slate-blue",
    "slate-blue-vs-royal-purple"
  ],
  "relatedFamilies": [
    "/colors/by-family/blue",
    "/colors/by-temperature/cool",
    "/colors/by-tone/balanced"
  ],
  "relatedTools": [
    "/harmonies/slate-blue",
    "/wcag/slate-blue",
    "/css/colors/slate-blue",
    "/hex/6a5acd",
    "/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/slate-blue"
    ],
    "related": [
      "/colors/iris",
      "/colors/royal-purple",
      "/colors/medium-slate-blue",
      "/colors/tanzanite",
      "/colors/royal-blue",
      "/compare/iris-vs-slate-blue",
      "/compare/medium-slate-blue-vs-slate-blue",
      "/compare/royal-blue-vs-slate-blue",
      "/compare/slate-blue-vs-royal-purple",
      "/harmonies/slate-blue",
      "/wcag/slate-blue",
      "/css/colors/slate-blue",
      "/hex/6a5acd",
      "/tools/css-gradient-generator",
      "/tools/color-palette-generator",
      "/tools/css-color-mixer",
      "/tools/contrast-checker"
    ]
  }
}
Full JSON dataset 
{
  "slug": "slate-blue",
  "name": "Slate Blue",
  "cssName": "slateblue",
  "hex": "#6A5ACD",
  "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": [
    "slateblue"
  ],
  "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": [
    106,
    90,
    205
  ],
  "hsl": [
    248,
    53,
    58
  ],
  "cmyk": [
    48,
    56,
    0,
    20
  ],
  "luminance": 0.1478,
  "contrast": {
    "black": 3.96,
    "white": 5.31
  },
  "harmonies": {
    "complementary": "#BECD5B",
    "analogous": [
      "#5B85CD",
      "#A35BCD"
    ],
    "triadic": [
      "#CD6A5B",
      "#5BCD6A"
    ],
    "tetradic": [
      "#CD5B85",
      "#BECD5B",
      "#5BCDA3"
    ],
    "splitComplementary": [
      "#CDA35B",
      "#85CD5B"
    ],
    "monochromatic": [
      "#AAA1E2",
      "#6A5ACD",
      "#3E309C"
    ]
  },
  "variants": {
    "light": "#AAA1E2",
    "dark": "#3E309C",
    "saturated": "#5944E4",
    "desaturated": "#7C73B5",
    "pastel": "#C8C3E4",
    "neon": "#6952FF"
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": []
  },
  "css": {
    "variable": "--color-slate-blue: #6A5ACD;",
    "utility": ".bg-slate-blue { background-color: #6A5ACD; }",
    "textUtility": ".text-slate-blue { color: #6A5ACD; }"
  },
  "nearestColors": [
    "iris",
    "royal-purple",
    "medium-slate-blue",
    "tanzanite",
    "royal-blue"
  ],
  "generatedPalettes": [
    "slate-blue"
  ],
  "generatedComparisons": [
    "iris-vs-slate-blue",
    "medium-slate-blue-vs-slate-blue",
    "royal-blue-vs-slate-blue",
    "slate-blue-vs-royal-purple"
  ],
  "relatedFamilies": [
    "/colors/by-family/blue",
    "/colors/by-temperature/cool",
    "/colors/by-tone/balanced"
  ],
  "relatedTools": [
    "/harmonies/slate-blue",
    "/wcag/slate-blue",
    "/css/colors/slate-blue",
    "/hex/6a5acd",
    "/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/slate-blue"
    ],
    "related": [
      "/colors/iris",
      "/colors/royal-purple",
      "/colors/medium-slate-blue",
      "/colors/tanzanite",
      "/colors/royal-blue",
      "/compare/iris-vs-slate-blue",
      "/compare/medium-slate-blue-vs-slate-blue",
      "/compare/royal-blue-vs-slate-blue",
      "/compare/slate-blue-vs-royal-purple",
      "/harmonies/slate-blue",
      "/wcag/slate-blue",
      "/css/colors/slate-blue",
      "/hex/6a5acd",
      "/tools/css-gradient-generator",
      "/tools/color-palette-generator",
      "/tools/css-color-mixer",
      "/tools/contrast-checker"
    ]
  },
  "pairings": {
    "best": [
      "#FFFFFF",
      "#BECD5B",
      "#5B85CD",
      "#A35BCD"
    ],
    "avoid": [
      "#7C73B5",
      "#AAA1E2"
    ],
    "neutral": [
      "#1A1A1A",
      "#F5F5F5",
      "#E8E8E4"
    ],
    "highContrast": [
      "#FFFFFF"
    ],
    "lowContrast": [
      "#AAA1E2",
      "#7C73B5"
    ]
  }
}
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

Similar Colors

Iris#5A4FCF
Royal Purple#7851A9
Medium Slate Blue#7B68EE
Tanzanite#4D5DAB
Royal Blue#4169E1

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.Slate Blue accessibilityCheck contrast and WCAG text options for #6A5ACD.Slate Blue CSS utilitiesUse Slate Blue in CSS variables and utility classes.#6A5ACD HEX atlasOpen the permanent HEX atlas record for conversions and variants.Slate Blue paletteOpen the generated palette based on Slate Blue.Slate Blue harmoniesExplore complementary, analogous, triadic, and tetradic harmonies.