Colors Encyclopedia

HEX atlas value

#AC5C15

#AC5C15 is a warm orange HEX color close to Sienna. According to Colors Encyclopedia, it converts to RGB 172, 92, 21, HSL 28, 78%, 38%, has luminance 0.1648, and belongs to the vibrant group.

orangewarmvibrant
#AC5C15 Sample readable text
HEX #AC5C15
RGB rgb(172, 92, 21)
HSL hsl(28 78% 38%)
CMYK cmyk(0, 47, 88, 33)
Luminance 0.1648
Contrast Black 4.3:1White 4.89:1

CSS

--color-ac5c15: #AC5C15;
.background-ac5c15 { background-color: #AC5C15; }
.text-ac5c15 { color: #AC5C15; }

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
Luminance0.1648
Black text4.3:1AA Fail
White text4.89:1AA 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":"#AC5C15","rgb":[172,92,21],"hsl":[28,78,38],"cmyk":[0,47,88,33],"luminance":0.1648,"contrast":{"black":4.3,"white":4.89}}
WCAG
{"AA":["#FFFFFF"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":4.3,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":4.89,"wcagAA":true,"wcagAAA":false}]
Accessible alternatives
[{"name":"#5B300B","hex":"#5B300B","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":1.87,"contrastWhite":11.22,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#ACA715","hex":"#ACA715","family":"yellow","bestTextColor":"#000000","contrastBlack":8.29,"contrastWhite":2.53,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"#E68937","hex":"#E68937","family":"orange","bestTextColor":"#000000","contrastBlack":8,"contrastWhite":2.63,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"#AC151A","hex":"#AC151A","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.88,"contrastWhite":7.3,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"#1566AC","hex":"#1566AC","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":3.53,"contrastWhite":5.95,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":[]}]
AI context
{"semanticGroups":["warm orange","vibrant","vibrant orange","Sienna adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-energy accents"],"contrastSafeWith":["#FFFFFF"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/ac5c15.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/sienna.json","https://www.colorsencyclopedia.com/api/colors/rust.json","https://www.colorsencyclopedia.com/api/colors/burnt-orange.json"]}
Harmonies
{"complementary":"#1566AC","analogous":["#AC151A","#ACA715"],"triadic":["#15AC5C","#5C15AC"],"tetradic":["#1AAC15","#1566AC","#A715AC"],"splitComplementary":["#15ACA7","#151AAC"],"monochromatic":["#E68937","#AC5C15","#5B300B"]}
Variants
{"light":"#E68937","dark":"#5B300B","saturated":"#C25A00","desaturated":"#975D2B","pastel":"#DC9D65","neon":"#EB6D00"}
Nearest named colors
[{"slug":"sienna","name":"Sienna","hex":"#A0522D","distance":28.635642126552707},{"slug":"rust","name":"Rust","hex":"#B7410E","distance":29.9833287011299},{"slug":"burnt-orange","name":"Burnt Orange","hex":"#CC5500","distance":38.91015291668744},{"slug":"copper","name":"Copper","hex":"#B87333","distance":39.66106403010388},{"slug":"polished-copper","name":"Polished Copper","hex":"#B87333","distance":39.66106403010388}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #AC5C15

#AC5C15 is classified as a warm orange value with vibrant visual character. #AC5C15 is visually closest to Sienna, a named orange color with HEX #A0522D.

The RGB channels are 172, 92, and 21, with red carrying the strongest channel weight. In HSL, the hue is 28deg 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 0.1648, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 28.64, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text4.3:1AA Fail
White text4.89:1AA Pass

AA text options: #FFFFFF.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #AC5C15 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000004.3:1 · Fail
White text#FFFFFF4.89:1 · AA

Accessible Alternatives

#5B300B#FFFFFF text · best 11.22:1#5B300B
#ACA715#000000 text · best 8.29:1#ACA715
#E68937#000000 text · best 8:1#E68937
#AC151A#FFFFFF text · best 7.3:1#AC151A
#1566AC#FFFFFF text · best 5.95:1#1566AC

Generated Palette

#AC5C15#AC5C15
#1566AC#1566AC
#AC151A#AC151A
#ACA715#ACA715
#E68937#E68937
#5B300B#5B300B

Color Harmonies

#1566AC#1566AC
#AC151A#AC151A
#ACA715#ACA715
#15AC5C#15AC5C
#5C15AC#5C15AC

Variants

#E68937#E68937
#5B300B#5B300B
#C25A00#C25A00
#975D2B#975D2B
#DC9D65#DC9D65
#EB6D00#EB6D00

Nearest Named Colors

Sienna#A0522D
Rust#B7410E
Burnt Orange#CC5500
Copper#B87333
Polished Copper#B87333

Related HEX Guides

Sienna colorOpen the nearest named color reference for #A0522D.Rust colorOpen the nearest named color reference for #B7410E.Burnt Orange colorOpen the nearest named color reference for #CC5500.Orange color familyBrowse named orange 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.#AC5C15 APIOpen the machine-readable JSON record for this HEX value.