Colors Encyclopedia

Named color

Smalt

Smalt is a jewel tone blue color with HEX #003399. According to Colors Encyclopedia, it has RGB 0, 51, 153, HSL 220, 100%, 30%, cool temperature, and is useful for historical references, pigment palettes, and cultural color systems.

#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

CSS Utilities

--color-smalt: #003399;
.bg-smalt { background-color: #003399; }
.text-smalt { color: #003399; }
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
Luminance0.0467
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"
  ],
  "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"
    ]
  }
}
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"
  ],
  "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"
    ]
  },
  "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

Color meaning and use

About Smalt Color

Smalt sits in the blue family with cool temperature and jewel tone visual character. Smalt is a commonly used color name in design references, palettes, and editorial color systems.

Its common associations include heritage, craft, and specificity, which makes it relevant for museum design and education. In design work, Smalt is most useful for historical references, pigment palettes, and cultural color systems, 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.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.

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

Similar Colors

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

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#00143D
Smalt#003399
#113988#113988
#2B6CEE#2B6CEE
#0041C2#0041C2

Pairings

White#FFFFFF
#996600#996600
#007F99#007F99
#190099#190099
Matte Black#1A1A1A
White Smoke#F5F5F5