Colors Encyclopedia

HEX atlas value

#A66B59

#A66B59 is a warm red HEX color close to Oak. According to Colors Encyclopedia, it converts to RGB 166, 107, 89, HSL 14, 30%, 50%, has luminance 0.1934, and belongs to the balanced group.

redwarmbalanced
#A66B59 Sample readable text
HEX #A66B59
RGB rgb(166, 107, 89)
HSL hsl(14 30% 50%)
CMYK cmyk(0, 36, 46, 35)
Luminance 0.1934
Contrast Black 4.87:1White 4.31:1

CSS

--color-a66b59: #A66B59;
.background-a66b59 { background-color: #A66B59; }
.text-a66b59 { color: #A66B59; }

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
Luminance0.1934
Black text4.87:1AA Pass
White text4.31:1AA 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":"#A66B59","rgb":[166,107,89],"hsl":[14,30,50],"cmyk":[0,36,46,35],"luminance":0.1934,"contrast":{"black":4.87,"white":4.31}}
WCAG
{"AA":["#000000"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":4.87,"wcagAA":true,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":4.31,"wcagAA":false,"wcagAAA":false}]
Accessible alternatives
[{"name":"#C6A095","hex":"#C6A095","family":"red","bestTextColor":"#000000","contrastBlack":8.86,"contrastWhite":2.37,"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":"#A69159","hex":"#A69159","family":"orange","bestTextColor":"#000000","contrastBlack":6.82,"contrastWhite":3.08,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]},{"name":"#5994A6","hex":"#5994A6","family":"cyan","bestTextColor":"#000000","contrastBlack":6.21,"contrastWhite":3.38,"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 red","balanced","balanced red","Oak adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-attention visual states"],"contrastSafeWith":["#000000"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/a66b59.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":"#5994A6","analogous":["#A6596E","#A69159"],"triadic":["#59A66B","#6B59A6"],"tetradic":["#6EA659","#5994A6","#9159A6"],"splitComplementary":["#59A691","#596EA6"],"monochromatic":["#C6A095","#A66B59","#6A4539"]}
Variants
{"light":"#C6A095","dark":"#6A4539","saturated":"#C25C3D","desaturated":"#8A7A75","pastel":"#C9BAB6","neon":"#FF5B29"}
Nearest named colors
[{"slug":"oak","name":"Oak","hex":"#A8754F","distance":14.2828568570857},{"slug":"caramel","name":"Caramel","hex":"#AF6E4D","distance":15.297058540778355},{"slug":"clay","name":"Clay","hex":"#B66A50","distance":18.384776310850235},{"slug":"desert-clay","name":"Desert Clay","hex":"#B86D4B","distance":22.891046284519195},{"slug":"mocha","name":"Mocha","hex":"#967969","distance":26.60826939130014}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #A66B59

#A66B59 is classified as a warm red value with balanced visual character. #A66B59 is visually closest to Oak, a named orange color with HEX #A8754F.

The RGB channels are 166, 107, and 89, with red carrying the strongest channel weight. In HSL, the hue is 14deg 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 high-attention visual states. Its luminance is 0.1934, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 14.28, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text4.87:1AA Pass
White text4.31:1AA Fail

AA text options: #000000.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #A66B59 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000004.87:1 · AA
White text#FFFFFF4.31:1 · Fail

Accessible Alternatives

#C6A095#000000 text · best 8.86:1#C6A095
#6A4539#FFFFFF text · best 8.32:1#6A4539
#A69159#000000 text · best 6.82:1#A69159
#5994A6#000000 text · best 6.21:1#5994A6
Desert Clay#000000 text · best 5.33:1#B86D4B

Generated Palette

#A66B59#A66B59
#5994A6#5994A6
#A6596E#A6596E
#A69159#A69159
#C6A095#C6A095
#6A4539#6A4539

Color Harmonies

#5994A6#5994A6
#A6596E#A6596E
#A69159#A69159
#59A66B#59A66B
#6B59A6#6B59A6

Variants

#C6A095#C6A095
#6A4539#6A4539
#C25C3D#C25C3D
#8A7A75#8A7A75
#C9BAB6#C9BAB6
#FF5B29#FF5B29

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.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.#A66B59 APIOpen the machine-readable JSON record for this HEX value.