Colors Encyclopedia

HEX atlas value

#AB402B

#AB402B is a warm red HEX color close to Sienna. According to Colors Encyclopedia, it converts to RGB 171, 64, 43, HSL 10, 60%, 42%, has luminance 0.125, and belongs to the balanced group.

redwarmbalanced
#AB402B Sample readable text
HEX #AB402B
RGB rgb(171, 64, 43)
HSL hsl(10 60% 42%)
CMYK cmyk(0, 63, 75, 33)
Luminance 0.125
Contrast Black 3.5:1White 6:1

CSS

--color-ab402b: #AB402B;
.background-ab402b { background-color: #AB402B; }
.text-ab402b { color: #AB402B; }

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
Luminance0.125
Black text3.5:1AA Fail
White text6:1AA 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":"#AB402B","rgb":[171,64,43],"hsl":[10,60,42],"cmyk":[0,63,75,33],"luminance":0.125,"contrast":{"black":3.5,"white":6}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":3.5,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":6,"wcagAA":true,"wcagAAA":false}]
Accessible alternatives
[{"name":"#622518","hex":"#622518","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.8,"contrastWhite":11.68,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Brown","hex":"#A52A2A","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.96,"contrastWhite":7.09,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"Firebrick","hex":"#B22222","family":"red","bestTextColor":"#FFFFFF","contrastBlack":3.14,"contrastWhite":6.68,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":[]},{"name":"#AB2B56","hex":"#AB2B56","family":"pink","bestTextColor":"#FFFFFF","contrastBlack":3.21,"contrastWhite":6.54,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":[]},{"name":"#D6705C","hex":"#D6705C","family":"red","bestTextColor":"#000000","contrastBlack":6.33,"contrastWhite":3.32,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]}]
AI context
{"semanticGroups":["warm red","balanced","balanced red","Sienna adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-attention visual states"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/ab402b.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/sienna.json","https://www.colorsencyclopedia.com/api/colors/brown.json","https://www.colorsencyclopedia.com/api/colors/rust.json"]}
Harmonies
{"complementary":"#2B96AB","analogous":["#AB2B56","#AB812B"],"triadic":["#2BAB40","#402BAB"],"tetradic":["#56AB2B","#2B96AB","#812BAB"],"splitComplementary":["#2BAB81","#2B56AB"],"monochromatic":["#D6705C","#AB402B","#622518"]}
Variants
{"light":"#D6705C","dark":"#622518","saturated":"#C33113","desaturated":"#945042","pastel":"#D19285","neon":"#FF2B00"}
Nearest named colors
[{"slug":"sienna","name":"Sienna","hex":"#A0522D","distance":21.18962010041709},{"slug":"brown","name":"Brown","hex":"#A52A2A","distance":22.825424421026653},{"slug":"rust","name":"Rust","hex":"#B7410E","distance":31.400636936215164},{"slug":"firebrick","name":"Firebrick","hex":"#B22222","distance":32.09361307176243},{"slug":"red-clay","name":"Red Clay","hex":"#B45A3C","distance":32.341923257592455}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #AB402B

#AB402B is classified as a warm red value with balanced visual character. #AB402B is visually closest to Sienna, a named orange color with HEX #A0522D.

The RGB channels are 171, 64, and 43, with red carrying the strongest channel weight. In HSL, the hue is 10deg with 60% saturation and 42% lightness, so this page treats it as a moderate-saturation, mid-lightness 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 high-attention visual states. Its luminance is 0.125, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 21.19, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.5:1AA Fail
White text6:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #AB402B needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.5:1 · Fail
White text#FFFFFF6:1 · AA

Accessible Alternatives

#622518#FFFFFF text · best 11.68:1#622518
Brown#FFFFFF text · best 7.09:1#A52A2A
Firebrick#FFFFFF text · best 6.68:1#B22222
#AB2B56#FFFFFF text · best 6.54:1#AB2B56
#D6705C#000000 text · best 6.33:1#D6705C

Generated Palette

#AB402B#AB402B
#2B96AB#2B96AB
#AB2B56#AB2B56
#AB812B#AB812B
#D6705C#D6705C
#622518#622518

Color Harmonies

#2B96AB#2B96AB
#AB2B56#AB2B56
#AB812B#AB812B
#2BAB40#2BAB40
#402BAB#402BAB

Variants

#D6705C#D6705C
#622518#622518
#C33113#C33113
#945042#945042
#D19285#D19285
#FF2B00#FF2B00

Nearest Named Colors

Sienna#A0522D
Brown#A52A2A
Rust#B7410E
Firebrick#B22222
Red Clay#B45A3C

Related HEX Guides

Sienna colorOpen the nearest named color reference for #A0522D.Brown colorOpen the nearest named color reference for #A52A2A.Rust colorOpen the nearest named color reference for #B7410E.Red color familyBrowse named red colors related to this HEX value.Warm colorsExplore colors with similar temperature behavior.Balanced colorsFind colors in the balanced 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.#AB402B APIOpen the machine-readable JSON record for this HEX value.