Colors Encyclopedia

HEX atlas value

#A42A04

#A42A04 is a warm red HEX color close to Pompeian Red. According to Colors Encyclopedia, it converts to RGB 164, 42, 4, HSL 14, 95%, 33%, has luminance 0.0956, and belongs to the balanced group.

redwarmbalanced
#A42A04 Sample readable text
HEX #A42A04
RGB rgb(164, 42, 4)
HSL hsl(14 95% 33%)
CMYK cmyk(0, 74, 98, 36)
Luminance 0.0956
Contrast Black 2.91:1White 7.21:1

CSS

--color-a42a04: #A42A04;
.background-a42a04 { background-color: #A42A04; }
.text-a42a04 { color: #A42A04; }

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
Luminance0.0956
Black text2.91:1AA Fail
White text7.21:1AA 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":"#A42A04","rgb":[164,42,4],"hsl":[14,95,33],"cmyk":[0,74,98,36],"luminance":0.0956,"contrast":{"black":2.91,"white":7.21}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":["#FFFFFF"]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":2.91,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":7.21,"wcagAA":true,"wcagAAA":true}]
Accessible alternatives
[{"name":"#4B1302","hex":"#4B1302","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.39,"contrastWhite":15.06,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Ruby Red","hex":"#9B111E","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.49,"contrastWhite":8.43,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#A4042F","hex":"#A4042F","family":"pink","bestTextColor":"#FFFFFF","contrastBlack":2.64,"contrastWhite":7.97,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#923317","hex":"#923317","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.71,"contrastWhite":7.75,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#A82700","hex":"#A82700","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.96,"contrastWhite":7.1,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]}]
AI context
{"semanticGroups":["warm red","balanced","balanced red","Pompeian Red adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-attention visual states"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/a42a04.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/pompeian-red.json","https://www.colorsencyclopedia.com/api/colors/rust.json","https://www.colorsencyclopedia.com/api/colors/firebrick.json"]}
Harmonies
{"complementary":"#047FA4","analogous":["#A4042F","#A47904"],"triadic":["#04A42A","#2A04A4"],"tetradic":["#2FA404","#047FA4","#7904A4"],"splitComplementary":["#04A479","#042FA4"],"monochromatic":["#F9430B","#A42A04","#4B1302"]}
Variants
{"light":"#F9430B","dark":"#4B1302","saturated":"#A82700","desaturated":"#923317","pastel":"#EA663E","neon":"#D13100"}
Nearest named colors
[{"slug":"pompeian-red","name":"Pompeian Red","hex":"#A42A04","distance":0},{"slug":"rust","name":"Rust","hex":"#B7410E","distance":31.464265445104548},{"slug":"firebrick","name":"Firebrick","hex":"#B22222","distance":34.058772731852805},{"slug":"mahogany","name":"Mahogany","hex":"#C04000","distance":35.832945734337834},{"slug":"ruby-red","name":"Ruby Red","hex":"#9B111E","distance":37.17526059088221}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #A42A04

#A42A04 is classified as a warm red value with balanced visual character. #A42A04 is visually closest to Pompeian Red, a named red color with HEX #A42A04.

The RGB channels are 164, 42, and 4, with red carrying the strongest channel weight. In HSL, the hue is 14deg with 95% saturation and 33% lightness, so this page treats it as a high-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 0.0956, 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 text2.91:1AA Fail
White text7.21:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #A42A04 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000002.91:1 · Fail
White text#FFFFFF7.21:1 · AAA

Accessible Alternatives

#4B1302#FFFFFF text · best 15.06:1#4B1302
Ruby Red#FFFFFF text · best 8.43:1#9B111E
#A4042F#FFFFFF text · best 7.97:1#A4042F
#923317#FFFFFF text · best 7.75:1#923317
#A82700#FFFFFF text · best 7.1:1#A82700

Generated Palette

Pompeian Red#A42A04
#047FA4#047FA4
#A4042F#A4042F
#A47904#A47904
#F9430B#F9430B
#4B1302#4B1302

Color Harmonies

#047FA4#047FA4
#A4042F#A4042F
#A47904#A47904
#04A42A#04A42A
#2A04A4#2A04A4

Variants

#F9430B#F9430B
#4B1302#4B1302
#A82700#A82700
#923317#923317
#EA663E#EA663E
#D13100#D13100

Nearest Named Colors

Pompeian Red#A42A04
Rust#B7410E
Firebrick#B22222
Mahogany#C04000
Ruby Red#9B111E

Related HEX Guides

Pompeian Red colorOpen the nearest named color reference for #A42A04.Rust colorOpen the nearest named color reference for #B7410E.Firebrick colorOpen the nearest named color reference for #B22222.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.#A42A04 APIOpen the machine-readable JSON record for this HEX value.