Colors Encyclopedia

Named color

Smalt

Smalt color #003399: RGB 0, 51, 153 and HSL 220°, 100%, 30%. Explore its cool blue profile, contrast, CSS, palettes and harmonies.

#003399 blue cool jewel-tone
HEX #003399
RGB rgb(0, 51, 153)
HSL hsl(220 100% 30%)
CMYK cmyk(100, 67, 0, 40)
Luminance 0.0467
Contrast Black 1.93:1White 10.86:1

Use this color

Create with Smalt

Open a professional color tool with #003399 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 Smalt 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-smalt: #003399;
.bg-smalt { background-color: #003399; }
.text-smalt { color: #003399; }
Open CSS utility pageReusable variables, classes, examples, and implementation notes

Color meaning and use

About Smalt Color

Smalt uses HEX #003399, RGB 0, 51, 153, and HSL 220°, 100%, 30%. The dataset classifies it in the blue family with cool temperature and jewel tone visual character.

No separate named-color neighbor is recorded for this entry. Its relative luminance is 0.0467; black contrast is 1.93:1 and white contrast is 10.86:1, making white the stronger of those two standard foreground choices.

WCAG Accessibility

Contrast checks for Smalt against black and white text.

Black text1.93:1AA Fail
White text10.86:1AA 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

Smalt Color Reference Infographic

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

1200 × 800
Smalt color reference infographic showing #003399, RGB and HSL values, a coordinated palette, and black and white text contrast.
Smalt color reference infographic generated from the verified Colors Encyclopedia dataset.
Download WebPDownload SVGOpen full size

Color Harmonies

#996600#996600#007F99#007F99#190099#190099#990033#990033#339900#339900
Open full Smalt harmony pageComplementary, analogous, triadic, tetradic, split, and monochromatic sets

Variants

#0052F5#0052F5#00143D#00143DSmalt#003399#113988#113988#2B6CEE#2B6CEE#0041C2#0041C2

Pairings

White#FFFFFF#996600#996600#007F99#007F99#190099#190099Matte 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
Luminance0.0467
Black text1.93:1AA Fail
White text10.86:1AA 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": "#003399",
  "rgb": [
    0,
    51,
    153
  ],
  "hsl": [
    220,
    100,
    30
  ],
  "cmyk": [
    100,
    67,
    0,
    40
  ],
  "luminance": 0.0467,
  "contrast": {
    "black": 1.93,
    "white": 10.86
  }
}
WCAG
{
  "AA": [
    "#FFFFFF",
    "#F5F5F5"
  ],
  "AAA": [
    "#FFFFFF",
    "#F5F5F5"
  ]
}
Harmonies
{
  "complementary": "#996600",
  "analogous": [
    "#007F99",
    "#190099"
  ],
  "triadic": [
    "#990033",
    "#339900"
  ],
  "tetradic": [
    "#99007F",
    "#996600",
    "#00991A"
  ],
  "splitComplementary": [
    "#991900",
    "#7F9900"
  ],
  "monochromatic": [
    "#0052F5",
    "#003399",
    "#00143D"
  ]
}
Variants
{
  "light": "#0052F5",
  "dark": "#00143D",
  "saturated": "#003399",
  "desaturated": "#113988",
  "pastel": "#2B6CEE",
  "neon": "#0041C2"
}
Pairings
{
  "best": [
    "#FFFFFF",
    "#996600",
    "#007F99",
    "#190099"
  ],
  "avoid": [
    "#113988",
    "#0052F5"
  ],
  "neutral": [
    "#1A1A1A",
    "#F5F5F5",
    "#E8E8E4"
  ],
  "highContrast": [
    "#FFFFFF"
  ],
  "lowContrast": [
    "#0052F5",
    "#113988"
  ]
}
Knowledge graph
{
  "nearestColors": [
    "egyptian-blue",
    "cobalt-blue",
    "zaffre",
    "persian-blue",
    "ultramarine"
  ],
  "generatedPalettes": [
    "smalt"
  ],
  "generatedComparisons": [
    "egyptian-blue-vs-smalt",
    "smalt-vs-cobalt-blue",
    "zaffre-vs-smalt"
  ],
  "relatedFamilies": [
    "/colors/by-family/blue",
    "/colors/by-temperature/cool",
    "/colors/by-tone/jewel-tone"
  ],
  "relatedTools": [
    "/harmonies/smalt",
    "/wcag/smalt",
    "/css/colors/smalt",
    "/hex/003399",
    "/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/jewel-tone"
    ],
    "narrower": [
      "/palettes/smalt"
    ],
    "related": [
      "/colors/egyptian-blue",
      "/colors/cobalt-blue",
      "/colors/zaffre",
      "/colors/persian-blue",
      "/colors/ultramarine",
      "/compare/egyptian-blue-vs-smalt",
      "/compare/smalt-vs-cobalt-blue",
      "/compare/zaffre-vs-smalt",
      "/harmonies/smalt",
      "/wcag/smalt",
      "/css/colors/smalt",
      "/hex/003399",
      "/tools/css-gradient-generator",
      "/tools/color-palette-generator",
      "/tools/css-color-mixer",
      "/tools/contrast-checker"
    ]
  }
}
Full JSON dataset 
{
  "slug": "smalt",
  "name": "Smalt",
  "hex": "#003399",
  "uses": [
    "historical references",
    "pigment palettes",
    "cultural color systems"
  ],
  "psychology": {
    "associations": [
      "heritage",
      "craft",
      "specificity"
    ],
    "contexts": [
      "museum design",
      "education",
      "editorial research",
      "cultural references"
    ],
    "avoidIn": [
      "generic unlabeled palette systems"
    ]
  },
  "aliases": [],
  "sourceType": "curated",
  "confidence": "medium",
  "reviewStatus": "manual",
  "sourceUrl": "https://www.colorsencyclopedia.com/assets/colors.json",
  "origin": {
    "type": "common",
    "notes": "Curated common color reference used in design, material, cultural, and editorial color systems."
  },
  "family": "blue",
  "temperature": "cool",
  "tone": [
    "jewel-tone"
  ],
  "editorialNotes": "Curated internal color record with computed technical properties.",
  "tags": [
    "blue",
    "cool",
    "jewel-tone",
    "historical-references",
    "pigment-palettes",
    "cultural-color-systems",
    "heritage",
    "craft",
    "specificity"
  ],
  "popularity": 84,
  "rgb": [
    0,
    51,
    153
  ],
  "hsl": [
    220,
    100,
    30
  ],
  "cmyk": [
    100,
    67,
    0,
    40
  ],
  "luminance": 0.0467,
  "contrast": {
    "black": 1.93,
    "white": 10.86
  },
  "harmonies": {
    "complementary": "#996600",
    "analogous": [
      "#007F99",
      "#190099"
    ],
    "triadic": [
      "#990033",
      "#339900"
    ],
    "tetradic": [
      "#99007F",
      "#996600",
      "#00991A"
    ],
    "splitComplementary": [
      "#991900",
      "#7F9900"
    ],
    "monochromatic": [
      "#0052F5",
      "#003399",
      "#00143D"
    ]
  },
  "variants": {
    "light": "#0052F5",
    "dark": "#00143D",
    "saturated": "#003399",
    "desaturated": "#113988",
    "pastel": "#2B6CEE",
    "neon": "#0041C2"
  },
  "wcag": {
    "AA": [
      "#FFFFFF",
      "#F5F5F5"
    ],
    "AAA": [
      "#FFFFFF",
      "#F5F5F5"
    ]
  },
  "css": {
    "variable": "--color-smalt: #003399;",
    "utility": ".bg-smalt { background-color: #003399; }",
    "textUtility": ".text-smalt { color: #003399; }"
  },
  "nearestColors": [
    "egyptian-blue",
    "cobalt-blue",
    "zaffre",
    "persian-blue",
    "ultramarine"
  ],
  "generatedPalettes": [
    "smalt"
  ],
  "generatedComparisons": [
    "egyptian-blue-vs-smalt",
    "smalt-vs-cobalt-blue",
    "zaffre-vs-smalt"
  ],
  "relatedFamilies": [
    "/colors/by-family/blue",
    "/colors/by-temperature/cool",
    "/colors/by-tone/jewel-tone"
  ],
  "relatedTools": [
    "/harmonies/smalt",
    "/wcag/smalt",
    "/css/colors/smalt",
    "/hex/003399",
    "/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/jewel-tone"
    ],
    "narrower": [
      "/palettes/smalt"
    ],
    "related": [
      "/colors/egyptian-blue",
      "/colors/cobalt-blue",
      "/colors/zaffre",
      "/colors/persian-blue",
      "/colors/ultramarine",
      "/compare/egyptian-blue-vs-smalt",
      "/compare/smalt-vs-cobalt-blue",
      "/compare/zaffre-vs-smalt",
      "/harmonies/smalt",
      "/wcag/smalt",
      "/css/colors/smalt",
      "/hex/003399",
      "/tools/css-gradient-generator",
      "/tools/color-palette-generator",
      "/tools/css-color-mixer",
      "/tools/contrast-checker"
    ]
  },
  "pairings": {
    "best": [
      "#FFFFFF",
      "#996600",
      "#007F99",
      "#190099"
    ],
    "avoid": [
      "#113988",
      "#0052F5"
    ],
    "neutral": [
      "#1A1A1A",
      "#F5F5F5",
      "#E8E8E4"
    ],
    "highContrast": [
      "#FFFFFF"
    ],
    "lowContrast": [
      "#0052F5",
      "#113988"
    ]
  }
}
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

Similar Colors

Egyptian Blue#1034A6
Cobalt Blue#0047AB
Zaffre#0014A8
Persian Blue#1C39BB
Ultramarine#120A8F

Related Color Guides

Blue color familyBrowse named blue colors and compare nearby swatches.Cool colorsExplore colors with cool temperature behavior.Jewel Tone colorsFind colors with jewel tone visual character.Smalt accessibilityCheck contrast and WCAG text options for #003399.Smalt CSS utilitiesUse Smalt in CSS variables and utility classes.#003399 HEX atlasOpen the permanent HEX atlas record for conversions and variants.Smalt paletteOpen the generated palette based on Smalt.Smalt harmoniesExplore complementary, analogous, triadic, and tetradic harmonies.