Colors Encyclopedia

Named color

Medium Blue

Medium Blue color #0000CD: RGB 0, 0, 205 and HSL 240°, 100%, 40%. Explore its cool blue profile, contrast, CSS, palettes and harmonies.

#0000CD blue cool vibrantjewel-tone
HEX #0000CD
RGB rgb(0, 0, 205)
HSL hsl(240 100% 40%)
CMYK cmyk(100, 100, 0, 20)
Luminance 0.0441
Contrast Black 1.88:1White 11.16:1

Use this color

Create with Medium Blue

Open a professional color tool with #0000CD 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 Medium 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-medium-blue: #0000CD;
.bg-medium-blue { background-color: #0000CD; }
.text-medium-blue { color: #0000CD; }
Open CSS utility pageReusable variables, classes, examples, and implementation notes

Color meaning and use

About Medium Blue Color

Medium Blue uses HEX #0000CD, RGB 0, 0, 205, and HSL 240°, 100%, 40%. The dataset classifies it in the blue family with cool temperature and vibrant and jewel tone visual character.

No separate named-color neighbor is recorded for this entry. Its relative luminance is 0.0441; black contrast is 1.88:1 and white contrast is 11.16:1, making white the stronger of those two standard foreground choices.

WCAG Accessibility

Contrast checks for Medium Blue against black and white text.

Black text1.88:1AA Fail
White text11.16:1AA 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

Medium Blue Color Reference Infographic

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

1200 × 800
Medium Blue color reference infographic showing #0000CD, RGB and HSL values, a coordinated palette, and black and white text contrast.
Medium Blue color reference infographic generated from the verified Colors Encyclopedia dataset.
Download WebPDownload SVGOpen full size

Color Harmonies

#CCCC00#CCCC00Anodized Blue#0066CC#6600CC#6600CC#CC0000#CC0000#00CC00#00CC00
Open full Medium Blue harmony pageComplementary, analogous, triadic, tetradic, split, and monochromatic sets

Variants

#2929FF#2929FF#000070#000070#0000CC#0000CC#1616B6#1616B6#5A5AF2#5A5AF2#0000F5#0000F5

Pairings

White#FFFFFF#CCCC00#CCCC00Anodized Blue#0066CC#6600CC#6600CCMatte 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
Luminance0.0441
Black text1.88:1AA Fail
White text11.16:1AA 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": "#0000CD",
  "rgb": [
    0,
    0,
    205
  ],
  "hsl": [
    240,
    100,
    40
  ],
  "cmyk": [
    100,
    100,
    0,
    20
  ],
  "luminance": 0.0441,
  "contrast": {
    "black": 1.88,
    "white": 11.16
  }
}
WCAG
{
  "AA": [
    "#FFFFFF",
    "#F5F5F5"
  ],
  "AAA": [
    "#FFFFFF",
    "#F5F5F5"
  ]
}
Harmonies
{
  "complementary": "#CCCC00",
  "analogous": [
    "#0066CC",
    "#6600CC"
  ],
  "triadic": [
    "#CC0000",
    "#00CC00"
  ],
  "tetradic": [
    "#CC0066",
    "#CCCC00",
    "#00CC66"
  ],
  "splitComplementary": [
    "#CC6600",
    "#66CC00"
  ],
  "monochromatic": [
    "#2929FF",
    "#0000CD",
    "#000070"
  ]
}
Variants
{
  "light": "#2929FF",
  "dark": "#000070",
  "saturated": "#0000CC",
  "desaturated": "#1616B6",
  "pastel": "#5A5AF2",
  "neon": "#0000F5"
}
Pairings
{
  "best": [
    "#FFFFFF",
    "#CCCC00",
    "#0066CC",
    "#6600CC"
  ],
  "avoid": [
    "#1616B6",
    "#2929FF"
  ],
  "neutral": [
    "#1A1A1A",
    "#F5F5F5",
    "#E8E8E4"
  ],
  "highContrast": [
    "#FFFFFF"
  ],
  "lowContrast": [
    "#2929FF",
    "#1616B6"
  ]
}
Knowledge graph
{
  "nearestColors": [
    "zaffre",
    "blue",
    "ultramarine",
    "dark-blue",
    "persian-blue"
  ],
  "generatedPalettes": [
    "medium-blue"
  ],
  "generatedComparisons": [
    "blue-vs-medium-blue",
    "medium-blue-vs-zaffre"
  ],
  "relatedFamilies": [
    "/colors/by-family/blue",
    "/colors/by-temperature/cool",
    "/colors/by-tone/vibrant",
    "/colors/by-tone/jewel-tone"
  ],
  "relatedTools": [
    "/harmonies/medium-blue",
    "/wcag/medium-blue",
    "/css/colors/medium-blue",
    "/hex/0000cd",
    "/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",
      "/colors/by-tone/jewel-tone"
    ],
    "narrower": [
      "/palettes/medium-blue"
    ],
    "related": [
      "/colors/zaffre",
      "/colors/blue",
      "/colors/ultramarine",
      "/colors/dark-blue",
      "/colors/persian-blue",
      "/compare/blue-vs-medium-blue",
      "/compare/medium-blue-vs-zaffre",
      "/harmonies/medium-blue",
      "/wcag/medium-blue",
      "/css/colors/medium-blue",
      "/hex/0000cd",
      "/tools/css-gradient-generator",
      "/tools/color-palette-generator",
      "/tools/css-color-mixer",
      "/tools/contrast-checker"
    ]
  }
}
Full JSON dataset 
{
  "slug": "medium-blue",
  "name": "Medium Blue",
  "cssName": "mediumblue",
  "hex": "#0000CD",
  "family": "blue",
  "temperature": "cool",
  "tone": [
    "vibrant",
    "jewel-tone"
  ],
  "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": [
    "mediumblue"
  ],
  "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",
    "jewel-tone",
    "web-design",
    "css-color-systems",
    "ui-prototyping",
    "context-dependent"
  ],
  "popularity": 67,
  "rgb": [
    0,
    0,
    205
  ],
  "hsl": [
    240,
    100,
    40
  ],
  "cmyk": [
    100,
    100,
    0,
    20
  ],
  "luminance": 0.0441,
  "contrast": {
    "black": 1.88,
    "white": 11.16
  },
  "harmonies": {
    "complementary": "#CCCC00",
    "analogous": [
      "#0066CC",
      "#6600CC"
    ],
    "triadic": [
      "#CC0000",
      "#00CC00"
    ],
    "tetradic": [
      "#CC0066",
      "#CCCC00",
      "#00CC66"
    ],
    "splitComplementary": [
      "#CC6600",
      "#66CC00"
    ],
    "monochromatic": [
      "#2929FF",
      "#0000CD",
      "#000070"
    ]
  },
  "variants": {
    "light": "#2929FF",
    "dark": "#000070",
    "saturated": "#0000CC",
    "desaturated": "#1616B6",
    "pastel": "#5A5AF2",
    "neon": "#0000F5"
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  "css": {
    "variable": "--color-medium-blue: #0000CD;",
    "utility": ".bg-medium-blue { background-color: #0000CD; }",
    "textUtility": ".text-medium-blue { color: #0000CD; }"
  },
  "nearestColors": [
    "zaffre",
    "blue",
    "ultramarine",
    "dark-blue",
    "persian-blue"
  ],
  "generatedPalettes": [
    "medium-blue"
  ],
  "generatedComparisons": [
    "blue-vs-medium-blue",
    "medium-blue-vs-zaffre"
  ],
  "relatedFamilies": [
    "/colors/by-family/blue",
    "/colors/by-temperature/cool",
    "/colors/by-tone/vibrant",
    "/colors/by-tone/jewel-tone"
  ],
  "relatedTools": [
    "/harmonies/medium-blue",
    "/wcag/medium-blue",
    "/css/colors/medium-blue",
    "/hex/0000cd",
    "/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",
      "/colors/by-tone/jewel-tone"
    ],
    "narrower": [
      "/palettes/medium-blue"
    ],
    "related": [
      "/colors/zaffre",
      "/colors/blue",
      "/colors/ultramarine",
      "/colors/dark-blue",
      "/colors/persian-blue",
      "/compare/blue-vs-medium-blue",
      "/compare/medium-blue-vs-zaffre",
      "/harmonies/medium-blue",
      "/wcag/medium-blue",
      "/css/colors/medium-blue",
      "/hex/0000cd",
      "/tools/css-gradient-generator",
      "/tools/color-palette-generator",
      "/tools/css-color-mixer",
      "/tools/contrast-checker"
    ]
  },
  "pairings": {
    "best": [
      "#FFFFFF",
      "#CCCC00",
      "#0066CC",
      "#6600CC"
    ],
    "avoid": [
      "#1616B6",
      "#2929FF"
    ],
    "neutral": [
      "#1A1A1A",
      "#F5F5F5",
      "#E8E8E4"
    ],
    "highContrast": [
      "#FFFFFF"
    ],
    "lowContrast": [
      "#2929FF",
      "#1616B6"
    ]
  }
}
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

Similar Colors

Zaffre#0014A8
Blue#0000FF
Ultramarine#120A8F
Dark Blue#00008B
Persian Blue#1C39BB

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.Jewel Tone colorsFind colors with jewel tone visual character.Medium Blue accessibilityCheck contrast and WCAG text options for #0000CD.Medium Blue CSS utilitiesUse Medium Blue in CSS variables and utility classes.#0000CD HEX atlasOpen the permanent HEX atlas record for conversions and variants.Medium Blue paletteOpen the generated palette based on Medium Blue.Medium Blue harmoniesExplore complementary, analogous, triadic, and tetradic harmonies.