Colors Encyclopedia

Named color

Royal Blue

Royal Blue color #4169E1: RGB 65, 105, 225 and HSL 225°, 73%, 57%. Explore its cool blue profile, contrast, CSS, palettes and harmonies.

#4169E1 blue cool vibrant
HEX #4169E1
RGB rgb(65, 105, 225)
HSL hsl(225 73% 57%)
CMYK cmyk(71, 53, 0, 12)
Luminance 0.1666
Contrast Black 4.33:1White 4.85:1

Use this color

Create with Royal Blue

Open a professional color tool with #4169E1 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 Royal 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-royal-blue: #4169E1;
.bg-royal-blue { background-color: #4169E1; }
.text-royal-blue { color: #4169E1; }
Open CSS utility pageReusable variables, classes, examples, and implementation notes

Color meaning and use

About Royal Blue Color

Royal Blue uses HEX #4169E1, RGB 65, 105, 225, and HSL 225°, 73%, 57%. The dataset classifies it in the blue family with cool temperature and vibrant visual character.

No separate named-color neighbor is recorded for this entry. Its relative luminance is 0.1666; black contrast is 4.33:1 and white contrast is 4.85:1, making white the stronger of those two standard foreground choices.

WCAG Accessibility

Contrast checks for Royal Blue against black and white text.

Black text4.33:1AA Fail
White text4.85:1AA Pass
AA text options#FFFFFF
AAA text optionsNone in seed set
Open WCAG pageDetailed contrast notes, warnings, alternatives, and UI examples

Downloadable color reference infographic

Royal Blue Color Reference Infographic

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

1200 × 800
Royal Blue color reference infographic showing #4169E1, RGB and HSL values, a coordinated palette, and black and white text contrast.
Royal Blue color reference infographic generated from the verified Colors Encyclopedia dataset.
Download WebPDownload SVGOpen full size

Color Harmonies

#E1B941#E1B941#41B9E1#41B9E1#6941E1#6941E1#E14169#E14169#69E141#69E141
Open full Royal Blue harmony pageComplementary, analogous, triadic, tetradic, split, and monochromatic sets

Variants

#91A8EE#91A8EE#1B3FAC#1B3FAC#295DFA#295DFA#5975C9#5975C9#B6C4EC#B6C4EC#4D79FF#4D79FF

Pairings

White#FFFFFF#E1B941#E1B941#41B9E1#41B9E1#6941E1#6941E1Matte 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
Luminance0.1666
Black text4.33:1AA Fail
White text4.85:1AA 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": "#4169E1",
  "rgb": [
    65,
    105,
    225
  ],
  "hsl": [
    225,
    73,
    57
  ],
  "cmyk": [
    71,
    53,
    0,
    12
  ],
  "luminance": 0.1666,
  "contrast": {
    "black": 4.33,
    "white": 4.85
  }
}
WCAG
{
  "AA": [
    "#FFFFFF"
  ],
  "AAA": []
}
Harmonies
{
  "complementary": "#E1B941",
  "analogous": [
    "#41B9E1",
    "#6941E1"
  ],
  "triadic": [
    "#E14169",
    "#69E141"
  ],
  "tetradic": [
    "#E141B9",
    "#E1B941",
    "#41E169"
  ],
  "splitComplementary": [
    "#E16941",
    "#B9E141"
  ],
  "monochromatic": [
    "#91A8EE",
    "#4169E1",
    "#1B3FAC"
  ]
}
Variants
{
  "light": "#91A8EE",
  "dark": "#1B3FAC",
  "saturated": "#295DFA",
  "desaturated": "#5975C9",
  "pastel": "#B6C4EC",
  "neon": "#4D79FF"
}
Pairings
{
  "best": [
    "#FFFFFF",
    "#E1B941",
    "#41B9E1",
    "#6941E1"
  ],
  "avoid": [
    "#5975C9",
    "#91A8EE"
  ],
  "neutral": [
    "#1A1A1A",
    "#F5F5F5",
    "#E8E8E4"
  ],
  "highContrast": [
    "#FFFFFF"
  ],
  "lowContrast": [
    "#91A8EE",
    "#5975C9"
  ]
}
Knowledge graph
{
  "nearestColors": [
    "iris",
    "slate-blue",
    "neon-blue",
    "steel-blue",
    "zircon-blue"
  ],
  "generatedPalettes": [
    "royal-blue"
  ],
  "generatedComparisons": [
    "iris-vs-royal-blue",
    "neon-blue-vs-royal-blue",
    "royal-blue-vs-slate-blue"
  ],
  "relatedFamilies": [
    "/colors/by-family/blue",
    "/colors/by-temperature/cool",
    "/colors/by-tone/vibrant"
  ],
  "relatedTools": [
    "/harmonies/royal-blue",
    "/wcag/royal-blue",
    "/css/colors/royal-blue",
    "/hex/4169e1",
    "/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/vibrant"
    ],
    "narrower": [
      "/palettes/royal-blue"
    ],
    "related": [
      "/colors/iris",
      "/colors/slate-blue",
      "/colors/neon-blue",
      "/colors/steel-blue",
      "/colors/zircon-blue",
      "/compare/iris-vs-royal-blue",
      "/compare/neon-blue-vs-royal-blue",
      "/compare/royal-blue-vs-slate-blue",
      "/harmonies/royal-blue",
      "/wcag/royal-blue",
      "/css/colors/royal-blue",
      "/hex/4169e1",
      "/tools/css-gradient-generator",
      "/tools/color-palette-generator",
      "/tools/css-color-mixer",
      "/tools/contrast-checker"
    ]
  }
}
Full JSON dataset 
{
  "slug": "royal-blue",
  "name": "Royal Blue",
  "cssName": "royalblue",
  "hex": "#4169E1",
  "family": "blue",
  "temperature": "cool",
  "tone": [
    "vibrant"
  ],
  "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": [
    "royalblue"
  ],
  "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",
    "vibrant",
    "web-design",
    "css-color-systems",
    "ui-prototyping",
    "context-dependent"
  ],
  "popularity": 67,
  "rgb": [
    65,
    105,
    225
  ],
  "hsl": [
    225,
    73,
    57
  ],
  "cmyk": [
    71,
    53,
    0,
    12
  ],
  "luminance": 0.1666,
  "contrast": {
    "black": 4.33,
    "white": 4.85
  },
  "harmonies": {
    "complementary": "#E1B941",
    "analogous": [
      "#41B9E1",
      "#6941E1"
    ],
    "triadic": [
      "#E14169",
      "#69E141"
    ],
    "tetradic": [
      "#E141B9",
      "#E1B941",
      "#41E169"
    ],
    "splitComplementary": [
      "#E16941",
      "#B9E141"
    ],
    "monochromatic": [
      "#91A8EE",
      "#4169E1",
      "#1B3FAC"
    ]
  },
  "variants": {
    "light": "#91A8EE",
    "dark": "#1B3FAC",
    "saturated": "#295DFA",
    "desaturated": "#5975C9",
    "pastel": "#B6C4EC",
    "neon": "#4D79FF"
  },
  "wcag": {
    "AA": [
      "#FFFFFF"
    ],
    "AAA": []
  },
  "css": {
    "variable": "--color-royal-blue: #4169E1;",
    "utility": ".bg-royal-blue { background-color: #4169E1; }",
    "textUtility": ".text-royal-blue { color: #4169E1; }"
  },
  "nearestColors": [
    "iris",
    "slate-blue",
    "neon-blue",
    "steel-blue",
    "zircon-blue"
  ],
  "generatedPalettes": [
    "royal-blue"
  ],
  "generatedComparisons": [
    "iris-vs-royal-blue",
    "neon-blue-vs-royal-blue",
    "royal-blue-vs-slate-blue"
  ],
  "relatedFamilies": [
    "/colors/by-family/blue",
    "/colors/by-temperature/cool",
    "/colors/by-tone/vibrant"
  ],
  "relatedTools": [
    "/harmonies/royal-blue",
    "/wcag/royal-blue",
    "/css/colors/royal-blue",
    "/hex/4169e1",
    "/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/vibrant"
    ],
    "narrower": [
      "/palettes/royal-blue"
    ],
    "related": [
      "/colors/iris",
      "/colors/slate-blue",
      "/colors/neon-blue",
      "/colors/steel-blue",
      "/colors/zircon-blue",
      "/compare/iris-vs-royal-blue",
      "/compare/neon-blue-vs-royal-blue",
      "/compare/royal-blue-vs-slate-blue",
      "/harmonies/royal-blue",
      "/wcag/royal-blue",
      "/css/colors/royal-blue",
      "/hex/4169e1",
      "/tools/css-gradient-generator",
      "/tools/color-palette-generator",
      "/tools/css-color-mixer",
      "/tools/contrast-checker"
    ]
  },
  "pairings": {
    "best": [
      "#FFFFFF",
      "#E1B941",
      "#41B9E1",
      "#6941E1"
    ],
    "avoid": [
      "#5975C9",
      "#91A8EE"
    ],
    "neutral": [
      "#1A1A1A",
      "#F5F5F5",
      "#E8E8E4"
    ],
    "highContrast": [
      "#FFFFFF"
    ],
    "lowContrast": [
      "#91A8EE",
      "#5975C9"
    ]
  }
}
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

Similar Colors

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Related Color Guides

Blue color familyBrowse named blue colors and compare nearby swatches.Cool colorsExplore colors with cool temperature behavior.Vibrant colorsFind colors with vibrant visual character.Royal Blue accessibilityCheck contrast and WCAG text options for #4169E1.Royal Blue CSS utilitiesUse Royal Blue in CSS variables and utility classes.#4169E1 HEX atlasOpen the permanent HEX atlas record for conversions and variants.Royal Blue paletteOpen the generated palette based on Royal Blue.Royal Blue harmoniesExplore complementary, analogous, triadic, and tetradic harmonies.