Colors Encyclopedia

HEX atlas value

#A66C59

#A66C59 is a warm orange HEX color close to Oak. According to Colors Encyclopedia, it converts to RGB 166, 108, 89, HSL 15, 30%, 50%, has luminance 0.1955, and belongs to the earth tone group.

orangewarmearth-tone
#A66C59 Sample readable text
HEX #A66C59
RGB rgb(166, 108, 89)
HSL hsl(15 30% 50%)
CMYK cmyk(0, 35, 46, 35)
Luminance 0.1955
Contrast Black 4.91:1White 4.28:1

CSS

--color-a66c59: #A66C59;
.background-a66c59 { background-color: #A66C59; }
.text-a66c59 { color: #A66C59; }

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
Luminance0.1955
Black text4.91:1AA Pass
White text4.28:1AA Fail
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":"#A66C59","rgb":[166,108,89],"hsl":[15,30,50],"cmyk":[0,35,46,35],"luminance":0.1955,"contrast":{"black":4.91,"white":4.28}}
WCAG
{"AA":["#000000"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":4.91,"wcagAA":true,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":4.28,"wcagAA":false,"wcagAAA":false}]
Accessible alternatives
[{"name":"#C6A195","hex":"#C6A195","family":"orange","bestTextColor":"#000000","contrastBlack":8.93,"contrastWhite":2.35,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#6A4539","hex":"#6A4539","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.52,"contrastWhite":8.32,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#A69359","hex":"#A69359","family":"yellow","bestTextColor":"#000000","contrastBlack":6.94,"contrastWhite":3.03,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]},{"name":"#5993A6","hex":"#5993A6","family":"blue","bestTextColor":"#000000","contrastBlack":6.15,"contrastWhite":3.42,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]},{"name":"Desert Clay","hex":"#B86D4B","family":"orange","bestTextColor":"#000000","contrastBlack":5.33,"contrastWhite":3.94,"wcagAA":["#000000"],"wcagAAA":[]}]
AI context
{"semanticGroups":["warm orange","earth tone","earth tone orange","Oak adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","natural palettes"],"contrastSafeWith":["#000000"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/a66c59.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/oak.json","https://www.colorsencyclopedia.com/api/colors/caramel.json","https://www.colorsencyclopedia.com/api/colors/clay.json"]}
Harmonies
{"complementary":"#5993A6","analogous":["#A6596C","#A69359"],"triadic":["#59A66C","#6C59A6"],"tetradic":["#6CA659","#5993A6","#9359A6"],"splitComplementary":["#59A693","#596CA6"],"monochromatic":["#C6A195","#A66C59","#6A4539"]}
Variants
{"light":"#C6A195","dark":"#6A4539","saturated":"#C25E3D","desaturated":"#8A7A75","pastel":"#C9BAB6","neon":"#FF5E29"}
Nearest named colors
[{"slug":"oak","name":"Oak","hex":"#A8754F","distance":13.601470508735444},{"slug":"caramel","name":"Caramel","hex":"#AF6E4D","distance":15.132745950421556},{"slug":"clay","name":"Clay","hex":"#B66A50","distance":18.466185312619388},{"slug":"desert-clay","name":"Desert Clay","hex":"#B86D4B","distance":22.825424421026653},{"slug":"mocha","name":"Mocha","hex":"#967969","distance":26.095976701399778}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #A66C59

#A66C59 is classified as a warm orange value with earth tone visual character. #A66C59 is visually closest to Oak, a named orange color with HEX #A8754F.

The RGB channels are 166, 108, and 89, with red carrying the strongest channel weight. In HSL, the hue is 15deg with 30% saturation and 50% lightness, so this page treats it as a low-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 natural palettes. Its luminance is 0.1955, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 13.60, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text4.91:1AA Pass
White text4.28:1AA Fail

AA text options: #000000.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #A66C59 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000004.91:1 · AA
White text#FFFFFF4.28:1 · Fail

Accessible Alternatives

#C6A195#000000 text · best 8.93:1#C6A195
#6A4539#FFFFFF text · best 8.32:1#6A4539
#A69359#000000 text · best 6.94:1#A69359
#5993A6#000000 text · best 6.15:1#5993A6
Desert Clay#000000 text · best 5.33:1#B86D4B

Generated Palette

#A66C59#A66C59
#5993A6#5993A6
#A6596C#A6596C
#A69359#A69359
#C6A195#C6A195
#6A4539#6A4539

Color Harmonies

#5993A6#5993A6
#A6596C#A6596C
#A69359#A69359
#59A66C#59A66C
#6C59A6#6C59A6

Variants

#C6A195#C6A195
#6A4539#6A4539
#C25E3D#C25E3D
#8A7A75#8A7A75
#C9BAB6#C9BAB6
#FF5E29#FF5E29

Nearest Named Colors

Oak#A8754F
Caramel#AF6E4D
Clay#B66A50
Desert Clay#B86D4B
Mocha#967969

Related HEX Guides

Oak colorOpen the nearest named color reference for #A8754F.Caramel colorOpen the nearest named color reference for #AF6E4D.Clay colorOpen the nearest named color reference for #B66A50.Orange color familyBrowse named orange colors related to this HEX value.Warm colorsExplore colors with similar temperature behavior.Earth Tone colorsFind colors in the earth tone 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.#A66C59 APIOpen the machine-readable JSON record for this HEX value.