Colors Encyclopedia

HEX atlas value

#263238

#263238 is a cool blue HEX color close to Charcoal Blue. According to Colors Encyclopedia, it converts to RGB 38, 50, 56, HSL 200, 19%, 18%, has luminance 0.0298, and belongs to the dark group.

bluecooldark
#263238 Sample readable text
HEX #263238
RGB rgb(38, 50, 56)
HSL hsl(200 19% 18%)
CMYK cmyk(32, 11, 0, 78)
Luminance 0.0298
Contrast Black 1.6:1White 13.16:1

CSS

--color-263238: #263238;
.background-263238 { background-color: #263238; }
.text-263238 { color: #263238; }

Machine-readable data

Machine-Readable HEX Data (JSON)

Structured HEX color data for conversion, WCAG checks, CSS generation, automation, and AI ingestion.

AI-Ready Dataset v1.0.0
Luminance0.0298
Black text1.6:1AA Fail
White text13.16:1AA 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":"#263238","rgb":[38,50,56],"hsl":[200,19,18],"cmyk":[32,11,0,78],"luminance":0.0298,"contrast":{"black":1.6,"white":13.16}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":["#FFFFFF","#F5F5F5"]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":1.6,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":13.16,"wcagAA":true,"wcagAAA":true}]
Accessible alternatives
[{"name":"Black","hex":"#000000","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1,"contrastWhite":21,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#252837","hex":"#252837","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.44,"contrastWhite":14.6,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Asphalt","hex":"#2B2B2B","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.48,"contrastWhite":14.15,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#372B25","hex":"#372B25","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":1.53,"contrastWhite":13.69,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#2E2E2E","hex":"#2E2E2E","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.55,"contrastWhite":13.58,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]
AI context
{"semanticGroups":["cool blue","dark","dark blue","Charcoal Blue adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","dark theme accents","calm digital interfaces"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/263238.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/charcoal-blue.json","https://www.colorsencyclopedia.com/api/colors/gunmetal.json","https://www.colorsencyclopedia.com/api/colors/jet.json"]}
Harmonies
{"complementary":"#372B25","analogous":["#253734","#252837"],"triadic":["#372531","#313725"],"tetradic":["#342537","#372B25","#283725"],"splitComplementary":["#372528","#373425"],"monochromatic":["#4A626D","#263238","#000000"]}
Variants
{"light":"#4A626D","dark":"#000000","saturated":"#1B3441","desaturated":"#2E2E2E","pastel":"#696F72","neon":"#005885"}
Nearest named colors
[{"slug":"charcoal-blue","name":"Charcoal Blue","hex":"#263238","distance":0},{"slug":"gunmetal","name":"Gunmetal","hex":"#2A3439","distance":4.58257569495584},{"slug":"jet","name":"Jet","hex":"#343434","distance":14.696938456699069},{"slug":"asphalt","name":"Asphalt","hex":"#2B2B2B","distance":15.588457268119896},{"slug":"onyx","name":"Onyx","hex":"#353839","distance":16.186414056238647}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #263238

#263238 is classified as a cool blue value with dark visual character. #263238 is visually closest to Charcoal Blue, a named blue color with HEX #263238.

The RGB channels are 38, 50, and 56, with blue carrying the strongest channel weight. In HSL, the hue is 200deg with 19% saturation and 18% lightness, so this page treats it as a low-saturation, dark atlas color rather than a generic swatch.

According to Colors Encyclopedia, this HEX value works best for color conversion, WCAG contrast checks, CSS color tokens, and dark theme accents. Its luminance is 0.0298, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 0.00, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text1.6:1AA Fail
White text13.16:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #263238 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000001.6:1 · Fail
White text#FFFFFF13.16:1 · AAA

Accessible Alternatives

Black#FFFFFF text · best 21:1#000000
#252837#FFFFFF text · best 14.6:1#252837
Asphalt#FFFFFF text · best 14.15:1#2B2B2B
#372B25#FFFFFF text · best 13.69:1#372B25
#2E2E2E#FFFFFF text · best 13.58:1#2E2E2E

Generated Palette

Charcoal Blue#263238
#372B25#372B25
#253734#253734
#252837#252837
#4A626D#4A626D
Black#000000

Color Harmonies

#372B25#372B25
#253734#253734
#252837#252837
#372531#372531
#313725#313725

Variants

#4A626D#4A626D
Black#000000
#1B3441#1B3441
#2E2E2E#2E2E2E
#696F72#696F72
#005885#005885

Nearest Named Colors

Charcoal Blue#263238
Gunmetal#2A3439
Jet#343434
Asphalt#2B2B2B
Onyx#353839

Related HEX Guides

Charcoal Blue colorOpen the nearest named color reference for #263238.Gunmetal colorOpen the nearest named color reference for #2A3439.Jet colorOpen the nearest named color reference for #343434.Blue color familyBrowse named blue colors related to this HEX value.Cool colorsExplore colors with similar temperature behavior.Dark colorsFind colors in the dark group.Color palettesBrowse palette systems related to generated color combinations.Compare colorsCompare named colors near this HEX value.Accessible colorsBrowse WCAG-friendly named colors and safe text options.#263238 APIOpen the machine-readable JSON record for this HEX value.