Colors Encyclopedia

HEX atlas value

#3F3131

#3F3131 is a warm red HEX color close to Peat. According to Colors Encyclopedia, it converts to RGB 63, 49, 49, HSL 0, 13%, 22%, has luminance 0.0348, and belongs to the dark group.

redwarmdark
#3F3131 Sample readable text
HEX #3F3131
RGB rgb(63, 49, 49)
HSL hsl(0 13% 22%)
CMYK cmyk(0, 22, 22, 75)
Luminance 0.0348
Contrast Black 1.7:1White 12.38:1

CSS

--color-3f3131: #3F3131;
.background-3f3131 { background-color: #3F3131; }
.text-3f3131 { color: #3F3131; }

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
Luminance0.0348
Black text1.7:1AA Fail
White text12.38:1AA 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":"#3F3131","rgb":[63,49,49],"hsl":[0,13,22],"cmyk":[0,22,22,75],"luminance":0.0348,"contrast":{"black":1.7,"white":12.38}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":["#FFFFFF","#F5F5F5"]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":1.7,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":12.38,"wcagAA":true,"wcagAAA":true}]
Accessible alternatives
[{"name":"#0C0909","hex":"#0C0909","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.06,"contrastWhite":19.85,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#4C2424","hex":"#4C2424","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.59,"contrastWhite":13.24,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Peat","hex":"#3B2F2F","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.63,"contrastWhite":12.85,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Jet","hex":"#343434","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.69,"contrastWhite":12.46,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#3F3138","hex":"#3F3138","family":"pink","bestTextColor":"#FFFFFF","contrastBlack":1.71,"contrastWhite":12.3,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]
AI context
{"semanticGroups":["warm red","dark","dark red","Peat 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/3f3131.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/peat.json","https://www.colorsencyclopedia.com/api/colors/jet.json","https://www.colorsencyclopedia.com/api/colors/graphite.json"]}
Harmonies
{"complementary":"#313F3F","analogous":["#3F3138","#3F3831"],"triadic":["#313F31","#31313F"],"tetradic":["#383F31","#313F3F","#38313F"],"splitComplementary":["#313F38","#31383F"],"monochromatic":["#735959","#3F3131","#0C0909"]}
Variants
{"light":"#735959","dark":"#0C0909","saturated":"#4C2424","desaturated":"#383838","pastel":"#787878","neon":"#990000"}
Nearest named colors
[{"slug":"peat","name":"Peat","hex":"#3B2F2F","distance":4.898979485566356},{"slug":"jet","name":"Jet","hex":"#343434","distance":11.789826122551595},{"slug":"graphite","name":"Graphite","hex":"#383838","distance":12.12435565298214},{"slug":"taupe","name":"Taupe","hex":"#483C32","distance":14.247806848775006},{"slug":"onyx","name":"Onyx","hex":"#353839","distance":14.594519519326424}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #3F3131

#3F3131 is classified as a warm red value with dark visual character. #3F3131 is visually closest to Peat, a named red color with HEX #3B2F2F.

The RGB channels are 63, 49, and 49, with red carrying the strongest channel weight. In HSL, the hue is 0deg with 13% saturation and 22% 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 0.0348, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 4.90, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text1.7:1AA Fail
White text12.38:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #3F3131 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000001.7:1 · Fail
White text#FFFFFF12.38:1 · AAA

Accessible Alternatives

#0C0909#FFFFFF text · best 19.85:1#0C0909
#4C2424#FFFFFF text · best 13.24:1#4C2424
Peat#FFFFFF text · best 12.85:1#3B2F2F
Jet#FFFFFF text · best 12.46:1#343434
#3F3138#FFFFFF text · best 12.3:1#3F3138

Generated Palette

#3F3131#3F3131
#313F3F#313F3F
#3F3138#3F3138
#3F3831#3F3831
#735959#735959
#0C0909#0C0909

Color Harmonies

#313F3F#313F3F
#3F3138#3F3138
#3F3831#3F3831
#313F31#313F31
#31313F#31313F

Variants

#735959#735959
#0C0909#0C0909
#4C2424#4C2424
Graphite#383838
#787878#787878
Crimson Red#990000

Nearest Named Colors

Peat#3B2F2F
Jet#343434
Graphite#383838
Taupe#483C32
Onyx#353839

Related HEX Guides

Peat colorOpen the nearest named color reference for #3B2F2F.Jet colorOpen the nearest named color reference for #343434.Graphite colorOpen the nearest named color reference for #383838.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.#3F3131 APIOpen the machine-readable JSON record for this HEX value.