Colors Encyclopedia

HEX atlas value

#331815

#331815 is a warm red HEX color close to Raisin. According to Colors Encyclopedia, it converts to RGB 51, 24, 21, HSL 6, 42%, 14%, has luminance 0.0141, and belongs to the dark group.

redwarmdark
#331815 Sample readable text
HEX #331815
RGB rgb(51, 24, 21)
HSL hsl(6 42% 14%)
CMYK cmyk(0, 53, 59, 80)
Luminance 0.0141
Contrast Black 1.28:1White 16.38:1

CSS

--color-331815: #331815;
.background-331815 { background-color: #331815; }
.text-331815 { color: #331815; }

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
Luminance0.0141
Black text1.28:1AA Fail
White text16.38:1AA 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":"#331815","rgb":[51,24,21],"hsl":[6,42,14],"cmyk":[0,53,59,80],"luminance":0.0141,"contrast":{"black":1.28,"white":16.38}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":["#FFFFFF","#F5F5F5"]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":1.28,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":16.38,"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":"Matte Black","hex":"#1A1A1A","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.21,"contrastWhite":17.41,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Carbon Fiber","hex":"#1C1C1C","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.23,"contrastWhite":17.05,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#331521","hex":"#331521","family":"pink","bestTextColor":"#FFFFFF","contrastBlack":1.27,"contrastWhite":16.54,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#3B110D","hex":"#3B110D","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.27,"contrastWhite":16.51,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]
AI context
{"semanticGroups":["warm red","dark","dark red","Raisin adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","dark theme accents","high-attention visual states"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/331815.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/raisin.json","https://www.colorsencyclopedia.com/api/colors/rubber.json","https://www.colorsencyclopedia.com/api/colors/carbon-fiber.json"]}
Harmonies
{"complementary":"#153033","analogous":["#331521","#332715"],"triadic":["#153318","#181533"],"tetradic":["#213315","#153033","#271533"],"splitComplementary":["#153327","#152133"],"monochromatic":["#74362F","#331815","#000000"]}
Variants
{"light":"#74362F","dark":"#000000","saturated":"#3B110D","desaturated":"#2B1E1D","pastel":"#7E4E49","neon":"#700B00"}
Nearest named colors
[{"slug":"raisin","name":"Raisin","hex":"#242124","distance":23.043437243605826},{"slug":"rubber","name":"Rubber","hex":"#2A2725","distance":23.706539182259394},{"slug":"carbon-fiber","name":"Carbon Fiber","hex":"#1C1C1C","distance":24.372115213907882},{"slug":"matte-black","name":"Matte Black","hex":"#1A1A1A","distance":25.573423705088842},{"slug":"slate-black","name":"Slate Black","hex":"#26282A","distance":29.427877939124322}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #331815

#331815 is classified as a warm red value with dark visual character. #331815 is visually closest to Raisin, a named gray color with HEX #242124.

The RGB channels are 51, 24, and 21, with red carrying the strongest channel weight. In HSL, the hue is 6deg with 42% saturation and 14% lightness, so this page treats it as a moderate-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 0.0141, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 23.04, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text1.28:1AA Fail
White text16.38:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #331815 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000001.28:1 · Fail
White text#FFFFFF16.38:1 · AAA

Accessible Alternatives

Black#FFFFFF text · best 21:1#000000
Matte Black#FFFFFF text · best 17.41:1#1A1A1A
Carbon Fiber#FFFFFF text · best 17.05:1#1C1C1C
#331521#FFFFFF text · best 16.54:1#331521
#3B110D#FFFFFF text · best 16.51:1#3B110D

Generated Palette

#331815#331815
#153033#153033
#331521#331521
#332715#332715
#74362F#74362F
Black#000000

Color Harmonies

#153033#153033
#331521#331521
#332715#332715
#153318#153318
#181533#181533

Variants

#74362F#74362F
Black#000000
#3B110D#3B110D
#2B1E1D#2B1E1D
#7E4E49#7E4E49
#700B00#700B00

Nearest Named Colors

Raisin#242124
Rubber#2A2725
Carbon Fiber#1C1C1C
Matte Black#1A1A1A
Slate Black#26282A

Related HEX Guides

Raisin colorOpen the nearest named color reference for #242124.Rubber colorOpen the nearest named color reference for #2A2725.Carbon Fiber colorOpen the nearest named color reference for #1C1C1C.Red color familyBrowse named red colors related to this HEX value.Warm 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.#331815 APIOpen the machine-readable JSON record for this HEX value.