Colors Encyclopedia

HEX atlas value

#2A3439

#2A3439 is a cool blue HEX color close to Gunmetal. According to Colors Encyclopedia, it converts to RGB 42, 52, 57, HSL 200, 15%, 19%, has luminance 0.0324, and belongs to the dark group.

bluecooldark
#2A3439 Sample readable text
HEX #2A3439
RGB rgb(42, 52, 57)
HSL hsl(200 15% 19%)
CMYK cmyk(26, 9, 0, 78)
Luminance 0.0324
Contrast Black 1.65:1White 12.74:1

CSS

--color-2a3439: #2A3439;
.background-2a3439 { background-color: #2A3439; }
.text-2a3439 { color: #2A3439; }

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
Luminance0.0324
Black text1.65:1AA Fail
White text12.74:1AA 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":"#2A3439","rgb":[42,52,57],"hsl":[200,15,19],"cmyk":[26,9,0,78],"luminance":0.0324,"contrast":{"black":1.65,"white":12.74}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":["#FFFFFF","#F5F5F5"]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":1.65,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":12.74,"wcagAA":true,"wcagAAA":true}]
Accessible alternatives
[{"name":"#020303","hex":"#020303","family":"cyan","bestTextColor":"#FFFFFF","contrastBlack":1.02,"contrastWhite":20.67,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#292C38","hex":"#292C38","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.51,"contrastWhite":13.89,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#382E29","hex":"#382E29","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":1.59,"contrastWhite":13.21,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#303030","hex":"#303030","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.59,"contrastWhite":13.19,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Charcoal Blue","hex":"#263238","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.6,"contrastWhite":13.16,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]
AI context
{"semanticGroups":["cool blue","dark","dark blue","Gunmetal 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/2a3439.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/gunmetal.json","https://www.colorsencyclopedia.com/api/colors/charcoal-blue.json","https://www.colorsencyclopedia.com/api/colors/jet.json"]}
Harmonies
{"complementary":"#382E29","analogous":["#293835","#292C38"],"triadic":["#382933","#333829"],"tetradic":["#352938","#382E29","#2C3829"],"splitComplementary":["#38292C","#383529"],"monochromatic":["#50636D","#2A3439","#020303"]}
Variants
{"light":"#50636D","dark":"#020303","saturated":"#1F3642","desaturated":"#303030","pastel":"#707070","neon":"#005C8A"}
Nearest named colors
[{"slug":"gunmetal","name":"Gunmetal","hex":"#2A3439","distance":0},{"slug":"charcoal-blue","name":"Charcoal Blue","hex":"#263238","distance":4.58257569495584},{"slug":"jet","name":"Jet","hex":"#343434","distance":11.180339887498949},{"slug":"onyx","name":"Onyx","hex":"#353839","distance":11.704699910719626},{"slug":"graphite","name":"Graphite","hex":"#383838","distance":14.594519519326424}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #2A3439

#2A3439 is classified as a cool blue value with dark visual character. #2A3439 is visually closest to Gunmetal, a named blue color with HEX #2A3439.

The RGB channels are 42, 52, and 57, with blue carrying the strongest channel weight. In HSL, the hue is 200deg with 15% saturation and 19% 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 0.0324, 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 text1.65:1AA Fail
White text12.74:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #2A3439 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000001.65:1 · Fail
White text#FFFFFF12.74:1 · AAA

Accessible Alternatives

#020303#FFFFFF text · best 20.67:1#020303
#292C38#FFFFFF text · best 13.89:1#292C38
#382E29#FFFFFF text · best 13.21:1#382E29
#303030#FFFFFF text · best 13.19:1#303030
Charcoal Blue#FFFFFF text · best 13.16:1#263238

Generated Palette

Gunmetal#2A3439
#382E29#382E29
#293835#293835
#292C38#292C38
#50636D#50636D
#020303#020303

Color Harmonies

#382E29#382E29
#293835#293835
#292C38#292C38
#382933#382933
#333829#333829

Variants

#50636D#50636D
#020303#020303
#1F3642#1F3642
#303030#303030
#707070#707070
#005C8A#005C8A

Nearest Named Colors

Gunmetal#2A3439
Charcoal Blue#263238
Jet#343434
Onyx#353839
Graphite#383838

Related HEX Guides

Gunmetal colorOpen the nearest named color reference for #2A3439.Charcoal Blue colorOpen the nearest named color reference for #263238.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.#2A3439 APIOpen the machine-readable JSON record for this HEX value.