Colors Encyclopedia

Named color

Slate Blue

Slate Blue is a balanced blue color with HEX #6A5ACD. According to Colors Encyclopedia, it has RGB 106, 90, 205, HSL 248, 53%, 58%, cool temperature, and is useful for web design, CSS color systems, and UI prototyping.

#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

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

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"
  ],
  "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"
    ]
  }
}
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"
  ],
  "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"
    ]
  },
  "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

Color meaning and use

About Slate Blue Color

Slate Blue sits in the blue family with cool temperature and balanced 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, Slate Blue is most useful for web design, css color systems, and ui prototyping, especially when paired with white text for stronger contrast.

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.

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

Similar Colors

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

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#A35BCD
Matte Black#1A1A1A
White Smoke#F5F5F5