Colors Encyclopedia

Named color

Light Slate Gray

Light Slate Gray color #778899: RGB 119, 136, 153 and HSL 210°, 14%, 53%. Explore its cool blue profile, contrast, CSS, palettes and harmonies.

#778899 blue cool muted
HEX #778899
RGB rgb(119, 136, 153)
HSL hsl(210 14% 53%)
CMYK cmyk(22, 11, 0, 40)
Luminance 0.2383
Contrast Black 5.77:1White 3.64:1

Use this color

Create with Light Slate Gray

Open a professional color tool with #778899 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 Light Slate Gray 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-light-slate-gray: #778899;
.bg-light-slate-gray { background-color: #778899; }
.text-light-slate-gray { color: #778899; }
Open CSS utility pageReusable variables, classes, examples, and implementation notes

Color meaning and use

About Light Slate Gray Color

Light Slate Gray uses HEX #778899, RGB 119, 136, 153, and HSL 210°, 14%, 53%. The dataset classifies it in the blue family with cool temperature and muted visual character.

No separate named-color neighbor is recorded for this entry. Its relative luminance is 0.2383; black contrast is 5.77:1 and white contrast is 3.64:1, making black the stronger of those two standard foreground choices.

WCAG Accessibility

Contrast checks for Light Slate Gray against black and white text.

Black text5.77:1AA Pass
White text3.64:1AA Fail
AA text options#000000, #1A1A1A
AAA text optionsNone in seed set
Open WCAG pageDetailed contrast notes, warnings, alternatives, and UI examples

Downloadable color reference infographic

Light Slate Gray Color Reference Infographic

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

1200 × 800
Light Slate Gray color reference infographic showing #778899, RGB and HSL values, a coordinated palette, and black and white text contrast.
Light Slate Gray color reference infographic generated from the verified Colors Encyclopedia dataset.
Download WebPDownload SVGOpen full size

Color Harmonies

#988776#988776#769898#769898#767698#767698#987687#987687#879876#879876
Open full Light Slate Gray harmony pageComplementary, analogous, triadic, tetradic, split, and monochromatic sets

Variants

#ABB5BF#ABB5BF#4D5966#4D5966#5C87B2#5C87B2#878787#878787#C7C7C7#C7C7C7#389CFF#389CFF

Pairings

Black#000000#988776#988776#769898#769898#767698#767698Matte 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
Luminance0.2383
Black text5.77:1AA Pass
White text3.64:1AA Fail
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": "#778899",
  "rgb": [
    119,
    136,
    153
  ],
  "hsl": [
    210,
    14,
    53
  ],
  "cmyk": [
    22,
    11,
    0,
    40
  ],
  "luminance": 0.2383,
  "contrast": {
    "black": 5.77,
    "white": 3.64
  }
}
WCAG
{
  "AA": [
    "#000000",
    "#1A1A1A"
  ],
  "AAA": []
}
Harmonies
{
  "complementary": "#988776",
  "analogous": [
    "#769898",
    "#767698"
  ],
  "triadic": [
    "#987687",
    "#879876"
  ],
  "tetradic": [
    "#987698",
    "#988776",
    "#769876"
  ],
  "splitComplementary": [
    "#987676",
    "#989876"
  ],
  "monochromatic": [
    "#ABB5BF",
    "#778899",
    "#4D5966"
  ]
}
Variants
{
  "light": "#ABB5BF",
  "dark": "#4D5966",
  "saturated": "#5C87B2",
  "desaturated": "#878787",
  "pastel": "#C7C7C7",
  "neon": "#389CFF"
}
Pairings
{
  "best": [
    "#000000",
    "#988776",
    "#769898",
    "#767698"
  ],
  "avoid": [
    "#878787",
    "#ABB5BF"
  ],
  "neutral": [
    "#1A1A1A",
    "#F5F5F5",
    "#E8E8E4"
  ],
  "highContrast": [
    "#000000"
  ],
  "lowContrast": [
    "#ABB5BF",
    "#878787"
  ]
}
Knowledge graph
{
  "nearestColors": [
    "light-slate-grey",
    "slate-gray",
    "slate-grey",
    "river-stone",
    "pewter"
  ],
  "generatedPalettes": [
    "light-slate-gray"
  ],
  "generatedComparisons": [
    "cadet-blue-vs-light-slate-gray",
    "light-slate-gray-vs-light-slate-grey",
    "light-slate-gray-vs-slate-gray",
    "slate-grey-vs-light-slate-gray"
  ],
  "relatedFamilies": [
    "/colors/by-family/blue",
    "/colors/by-temperature/cool",
    "/colors/by-tone/muted"
  ],
  "relatedTools": [
    "/harmonies/light-slate-gray",
    "/wcag/light-slate-gray",
    "/css/colors/light-slate-gray",
    "/hex/778899",
    "/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/muted"
    ],
    "narrower": [
      "/palettes/light-slate-gray"
    ],
    "related": [
      "/colors/light-slate-grey",
      "/colors/slate-gray",
      "/colors/slate-grey",
      "/colors/river-stone",
      "/colors/pewter",
      "/compare/cadet-blue-vs-light-slate-gray",
      "/compare/light-slate-gray-vs-light-slate-grey",
      "/compare/light-slate-gray-vs-slate-gray",
      "/compare/slate-grey-vs-light-slate-gray",
      "/harmonies/light-slate-gray",
      "/wcag/light-slate-gray",
      "/css/colors/light-slate-gray",
      "/hex/778899",
      "/tools/css-gradient-generator",
      "/tools/color-palette-generator",
      "/tools/css-color-mixer",
      "/tools/contrast-checker"
    ]
  }
}
Full JSON dataset 
{
  "slug": "light-slate-gray",
  "name": "Light Slate Gray",
  "cssName": "lightslategray",
  "hex": "#778899",
  "family": "blue",
  "temperature": "cool",
  "tone": [
    "muted"
  ],
  "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": [
    "lightslategray"
  ],
  "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",
    "muted",
    "web-design",
    "css-color-systems",
    "ui-prototyping",
    "context-dependent"
  ],
  "popularity": 67,
  "rgb": [
    119,
    136,
    153
  ],
  "hsl": [
    210,
    14,
    53
  ],
  "cmyk": [
    22,
    11,
    0,
    40
  ],
  "luminance": 0.2383,
  "contrast": {
    "black": 5.77,
    "white": 3.64
  },
  "harmonies": {
    "complementary": "#988776",
    "analogous": [
      "#769898",
      "#767698"
    ],
    "triadic": [
      "#987687",
      "#879876"
    ],
    "tetradic": [
      "#987698",
      "#988776",
      "#769876"
    ],
    "splitComplementary": [
      "#987676",
      "#989876"
    ],
    "monochromatic": [
      "#ABB5BF",
      "#778899",
      "#4D5966"
    ]
  },
  "variants": {
    "light": "#ABB5BF",
    "dark": "#4D5966",
    "saturated": "#5C87B2",
    "desaturated": "#878787",
    "pastel": "#C7C7C7",
    "neon": "#389CFF"
  },
  "wcag": {
    "AA": [
      "#000000",
      "#1A1A1A"
    ],
    "AAA": []
  },
  "css": {
    "variable": "--color-light-slate-gray: #778899;",
    "utility": ".bg-light-slate-gray { background-color: #778899; }",
    "textUtility": ".text-light-slate-gray { color: #778899; }"
  },
  "nearestColors": [
    "light-slate-grey",
    "slate-gray",
    "slate-grey",
    "river-stone",
    "pewter"
  ],
  "generatedPalettes": [
    "light-slate-gray"
  ],
  "generatedComparisons": [
    "cadet-blue-vs-light-slate-gray",
    "light-slate-gray-vs-light-slate-grey",
    "light-slate-gray-vs-slate-gray",
    "slate-grey-vs-light-slate-gray"
  ],
  "relatedFamilies": [
    "/colors/by-family/blue",
    "/colors/by-temperature/cool",
    "/colors/by-tone/muted"
  ],
  "relatedTools": [
    "/harmonies/light-slate-gray",
    "/wcag/light-slate-gray",
    "/css/colors/light-slate-gray",
    "/hex/778899",
    "/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/muted"
    ],
    "narrower": [
      "/palettes/light-slate-gray"
    ],
    "related": [
      "/colors/light-slate-grey",
      "/colors/slate-gray",
      "/colors/slate-grey",
      "/colors/river-stone",
      "/colors/pewter",
      "/compare/cadet-blue-vs-light-slate-gray",
      "/compare/light-slate-gray-vs-light-slate-grey",
      "/compare/light-slate-gray-vs-slate-gray",
      "/compare/slate-grey-vs-light-slate-gray",
      "/harmonies/light-slate-gray",
      "/wcag/light-slate-gray",
      "/css/colors/light-slate-gray",
      "/hex/778899",
      "/tools/css-gradient-generator",
      "/tools/color-palette-generator",
      "/tools/css-color-mixer",
      "/tools/contrast-checker"
    ]
  },
  "pairings": {
    "best": [
      "#000000",
      "#988776",
      "#769898",
      "#767698"
    ],
    "avoid": [
      "#878787",
      "#ABB5BF"
    ],
    "neutral": [
      "#1A1A1A",
      "#F5F5F5",
      "#E8E8E4"
    ],
    "highContrast": [
      "#000000"
    ],
    "lowContrast": [
      "#ABB5BF",
      "#878787"
    ]
  }
}
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

Similar Colors

Light Slate Grey#778899
Slate Gray#708090
Slate Grey#708090
River Stone#7E8A8A
Pewter#899499

Related Color Guides

Blue color familyBrowse named blue colors and compare nearby swatches.Cool colorsExplore colors with cool temperature behavior.Muted colorsFind colors with muted visual character.Light Slate Gray accessibilityCheck contrast and WCAG text options for #778899.Light Slate Gray CSS utilitiesUse Light Slate Gray in CSS variables and utility classes.#778899 HEX atlasOpen the permanent HEX atlas record for conversions and variants.Light Slate Gray paletteOpen the generated palette based on Light Slate Gray.Light Slate Gray harmoniesExplore complementary, analogous, triadic, and tetradic harmonies.