Colors Encyclopedia

HEX atlas value

#D23404

#D23404 is a warm red HEX color close to Mahogany. According to Colors Encyclopedia, it converts to RGB 210, 52, 4, HSL 14, 96%, 42%, has luminance 0.1617, and belongs to the vibrant group.

redwarmvibrant
#D23404 Sample readable text
HEX #D23404
RGB rgb(210, 52, 4)
HSL hsl(14 96% 42%)
CMYK cmyk(0, 75, 98, 18)
Luminance 0.1617
Contrast Black 4.23:1White 4.96:1

CSS

--color-d23404: #D23404;
.background-d23404 { background-color: #D23404; }
.text-d23404 { color: #D23404; }

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
Luminance0.1617
Black text4.23:1AA Fail
White text4.96:1AA 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":"#D23404","rgb":[210,52,4],"hsl":[14,96,42],"cmyk":[0,75,98,18],"luminance":0.1617,"contrast":{"black":4.23,"white":4.96}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":4.23,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":4.96,"wcagAA":true,"wcagAAA":false}]
Accessible alternatives
[{"name":"#781E02","hex":"#781E02","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.99,"contrastWhite":10.57,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#D29B04","hex":"#D29B04","family":"orange","bestTextColor":"#000000","contrastBlack":8.43,"contrastWhite":2.49,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"Pompeian Red","hex":"#A42A04","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.91,"contrastWhite":7.21,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"#04A2D2","hex":"#04A2D2","family":"cyan","bestTextColor":"#000000","contrastBlack":7.1,"contrastWhite":2.96,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"#FB6537","hex":"#FB6537","family":"red","bestTextColor":"#000000","contrastBlack":7.02,"contrastWhite":2.99,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]}]
AI context
{"semanticGroups":["warm red","vibrant","vibrant red","Mahogany adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-energy accents","high-attention visual states"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/d23404.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/mahogany.json","https://www.colorsencyclopedia.com/api/colors/rust.json","https://www.colorsencyclopedia.com/api/colors/burnt-orange.json"]}
Harmonies
{"complementary":"#04A2D2","analogous":["#D2043B","#D29B04"],"triadic":["#04D234","#3404D2"],"tetradic":["#3BD204","#04A2D2","#9B04D2"],"splitComplementary":["#04D29B","#043BD2"],"monochromatic":["#FB6537","#D23404","#781E02"]}
Variants
{"light":"#FB6537","dark":"#781E02","saturated":"#D63200","desaturated":"#BA411C","pastel":"#EF8667","neon":"#FF3C00"}
Nearest named colors
[{"slug":"mahogany","name":"Mahogany","hex":"#C04000","distance":22},{"slug":"rust","name":"Rust","hex":"#B7410E","distance":31.591137997862628},{"slug":"burnt-orange","name":"Burnt Orange","hex":"#CC5500","distance":33.77869150810907},{"slug":"traffic-red","name":"Traffic Red","hex":"#CC0605","distance":46.400431032480725},{"slug":"pompeian-red","name":"Pompeian Red","hex":"#A42A04","distance":47.07440918375928}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #D23404

#D23404 is classified as a warm red value with vibrant visual character. #D23404 is visually closest to Mahogany, a named orange color with HEX #C04000.

The RGB channels are 210, 52, and 4, with red carrying the strongest channel weight. In HSL, the hue is 14deg with 96% saturation and 42% 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-energy accents. Its luminance is 0.1617, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 22.00, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text4.23:1AA Fail
White text4.96:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #D23404 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000004.23:1 · Fail
White text#FFFFFF4.96:1 · AA

Accessible Alternatives

#781E02#FFFFFF text · best 10.57:1#781E02
#D29B04#000000 text · best 8.43:1#D29B04
Pompeian Red#FFFFFF text · best 7.21:1#A42A04
#04A2D2#000000 text · best 7.1:1#04A2D2
#FB6537#000000 text · best 7.02:1#FB6537

Generated Palette

#D23404#D23404
#04A2D2#04A2D2
#D2043B#D2043B
#D29B04#D29B04
#FB6537#FB6537
#781E02#781E02

Color Harmonies

#04A2D2#04A2D2
#D2043B#D2043B
#D29B04#D29B04
#04D234#04D234
#3404D2#3404D2

Variants

#FB6537#FB6537
#781E02#781E02
#D63200#D63200
#BA411C#BA411C
#EF8667#EF8667
#FF3C00#FF3C00

Nearest Named Colors

Mahogany#C04000
Rust#B7410E
Burnt Orange#CC5500
Traffic Red#CC0605
Pompeian Red#A42A04

Related HEX Guides

Mahogany colorOpen the nearest named color reference for #C04000.Rust colorOpen the nearest named color reference for #B7410E.Burnt Orange colorOpen the nearest named color reference for #CC5500.Red color familyBrowse named red colors related to this HEX value.Warm colorsExplore colors with similar temperature behavior.Vibrant colorsFind colors in the vibrant 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.#D23404 APIOpen the machine-readable JSON record for this HEX value.