Colors Encyclopedia

HEX atlas value

#AC3915

#AC3915 is a warm red HEX color close to Rust. According to Colors Encyclopedia, it converts to RGB 172, 57, 21, HSL 14, 78%, 38%, has luminance 0.1175, and belongs to the vibrant group.

redwarmvibrant
#AC3915 Sample readable text
HEX #AC3915
RGB rgb(172, 57, 21)
HSL hsl(14 78% 38%)
CMYK cmyk(0, 67, 88, 33)
Luminance 0.1175
Contrast Black 3.35:1White 6.27:1

CSS

--color-ac3915: #AC3915;
.background-ac3915 { background-color: #AC3915; }
.text-ac3915 { color: #AC3915; }

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
Luminance0.1175
Black text3.35:1AA Fail
White text6.27:1AA 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":"#AC3915","rgb":[172,57,21],"hsl":[14,78,38],"cmyk":[0,67,88,33],"luminance":0.1175,"contrast":{"black":3.35,"white":6.27}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":3.35,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":6.27,"wcagAA":true,"wcagAAA":false}]
Accessible alternatives
[{"name":"#5B1E0B","hex":"#5B1E0B","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.64,"contrastWhite":12.84,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Pompeian Red","hex":"#A42A04","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.91,"contrastWhite":7.21,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"#AC153E","hex":"#AC153E","family":"pink","bestTextColor":"#FFFFFF","contrastBlack":2.93,"contrastWhite":7.17,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"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":[]}]
AI context
{"semanticGroups":["warm red","vibrant","vibrant red","Rust 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/ac3915.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/rust.json","https://www.colorsencyclopedia.com/api/colors/pompeian-red.json","https://www.colorsencyclopedia.com/api/colors/brown.json"]}
Harmonies
{"complementary":"#1589AC","analogous":["#AC153E","#AC8415"],"triadic":["#15AC39","#3915AC"],"tetradic":["#3EAC15","#1589AC","#8415AC"],"splitComplementary":["#15AC84","#153EAC"],"monochromatic":["#E66037","#AC3915","#5B1E0B"]}
Variants
{"light":"#E66037","dark":"#5B1E0B","saturated":"#C22D00","desaturated":"#97442B","pastel":"#DC8165","neon":"#EB3700"}
Nearest named colors
[{"slug":"rust","name":"Rust","hex":"#B7410E","distance":15.297058540778355},{"slug":"pompeian-red","name":"Pompeian Red","hex":"#A42A04","distance":24.041630560342615},{"slug":"brown","name":"Brown","hex":"#A52A2A","distance":26.739483914241877},{"slug":"firebrick","name":"Firebrick","hex":"#B22222","distance":27.09243436828813},{"slug":"mahogany","name":"Mahogany","hex":"#C04000","distance":29.832867780352597}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #AC3915

#AC3915 is classified as a warm red value with vibrant visual character. #AC3915 is visually closest to Rust, a named orange color with HEX #B7410E.

The RGB channels are 172, 57, and 21, with red carrying the strongest channel weight. In HSL, the hue is 14deg with 78% saturation and 38% 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 0.1175, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 15.30, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.35:1AA Fail
White text6.27:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #AC3915 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.35:1 · Fail
White text#FFFFFF6.27:1 · AA

Accessible Alternatives

#5B1E0B#FFFFFF text · best 12.84:1#5B1E0B
Pompeian Red#FFFFFF text · best 7.21:1#A42A04
#AC153E#FFFFFF text · best 7.17:1#AC153E
Brown#FFFFFF text · best 7.09:1#A52A2A
Firebrick#FFFFFF text · best 6.68:1#B22222

Generated Palette

#AC3915#AC3915
#1589AC#1589AC
#AC153E#AC153E
#AC8415#AC8415
#E66037#E66037
#5B1E0B#5B1E0B

Color Harmonies

#1589AC#1589AC
#AC153E#AC153E
#AC8415#AC8415
#15AC39#15AC39
#3915AC#3915AC

Variants

#E66037#E66037
#5B1E0B#5B1E0B
#C22D00#C22D00
#97442B#97442B
#DC8165#DC8165
#EB3700#EB3700

Nearest Named Colors

Rust#B7410E
Pompeian Red#A42A04
Brown#A52A2A
Firebrick#B22222
Mahogany#C04000

Related HEX Guides

Rust colorOpen the nearest named color reference for #B7410E.Pompeian Red colorOpen the nearest named color reference for #A42A04.Brown colorOpen the nearest named color reference for #A52A2A.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.#AC3915 APIOpen the machine-readable JSON record for this HEX value.