Colors Encyclopedia

HEX atlas value

#66511E

#66511E is a warm orange HEX color close to Sepia. According to Colors Encyclopedia, it converts to RGB 102, 81, 30, HSL 42, 55%, 26%, has luminance 0.088, and belongs to the earth tone group.

orangewarmearth-tone
#66511E Sample readable text
HEX #66511E
RGB rgb(102, 81, 30)
HSL hsl(42 55% 26%)
CMYK cmyk(0, 21, 71, 60)
Luminance 0.088
Contrast Black 2.76:1White 7.61:1

CSS

--color-66511e: #66511E;
.background-66511e { background-color: #66511E; }
.text-66511e { color: #66511E; }

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
Luminance0.088
Black text2.76:1AA Fail
White text7.61:1AA 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":"#66511E","rgb":[102,81,30],"hsl":[42,55,26],"cmyk":[0,21,71,60],"luminance":0.088,"contrast":{"black":2.76,"white":7.61}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":["#FFFFFF"]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":2.76,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":7.61,"wcagAA":true,"wcagAAA":true}]
Accessible alternatives
[{"name":"#201909","hex":"#201909","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":1.2,"contrastWhite":17.44,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#1E3467","hex":"#1E3467","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.74,"contrastWhite":12.06,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#672C1E","hex":"#672C1E","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.96,"contrastWhite":10.74,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Bark","hex":"#5B3A29","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.08,"contrastWhite":10.09,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Walnut","hex":"#5C4033","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.24,"contrastWhite":9.39,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]
AI context
{"semanticGroups":["warm orange","earth tone","earth tone orange","Sepia adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","natural palettes"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/66511e.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/sepia.json","https://www.colorsencyclopedia.com/api/colors/coffee.json","https://www.colorsencyclopedia.com/api/colors/bark.json"]}
Harmonies
{"complementary":"#1E3467","analogous":["#672C1E","#58671E"],"triadic":["#1E6751","#511E67"],"tetradic":["#1E672C","#1E3467","#671E58"],"splitComplementary":["#1E5867","#2C1E67"],"monochromatic":["#AE8932","#66511E","#201909"]}
Variants
{"light":"#AE8932","dark":"#201909","saturated":"#75570F","desaturated":"#584B2C","pastel":"#B49650","neon":"#AD7900"}
Nearest named colors
[{"slug":"sepia","name":"Sepia","hex":"#704214","distance":20.615528128088304},{"slug":"coffee","name":"Coffee","hex":"#6F4E37","distance":26.739483914241877},{"slug":"bark","name":"Bark","hex":"#5B3A29","distance":27.76688675382964},{"slug":"loam","name":"Loam","hex":"#6B4F3A","distance":28.513154858766505},{"slug":"walnut","name":"Walnut","hex":"#5C4033","distance":28.809720581775867}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #66511E

#66511E is classified as a warm orange value with earth tone visual character. #66511E is visually closest to Sepia, a named orange color with HEX #704214.

The RGB channels are 102, 81, and 30, with red carrying the strongest channel weight. In HSL, the hue is 42deg with 55% saturation and 26% lightness, so this page treats it as a moderate-saturation, dark 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 0.088, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 20.62, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text2.76:1AA Fail
White text7.61:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #66511E needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000002.76:1 · Fail
White text#FFFFFF7.61:1 · AAA

Accessible Alternatives

#201909#FFFFFF text · best 17.44:1#201909
#1E3467#FFFFFF text · best 12.06:1#1E3467
#672C1E#FFFFFF text · best 10.74:1#672C1E
Bark#FFFFFF text · best 10.09:1#5B3A29
Walnut#FFFFFF text · best 9.39:1#5C4033

Generated Palette

#66511E#66511E
#1E3467#1E3467
#672C1E#672C1E
#58671E#58671E
#AE8932#AE8932
#201909#201909

Color Harmonies

#1E3467#1E3467
#672C1E#672C1E
#58671E#58671E
#1E6751#1E6751
#511E67#511E67

Variants

#AE8932#AE8932
#201909#201909
#75570F#75570F
#584B2C#584B2C
#B49650#B49650
#AD7900#AD7900

Nearest Named Colors

Sepia#704214
Coffee#6F4E37
Bark#5B3A29
Loam#6B4F3A
Walnut#5C4033

Related HEX Guides

Sepia colorOpen the nearest named color reference for #704214.Coffee colorOpen the nearest named color reference for #6F4E37.Bark colorOpen the nearest named color reference for #5B3A29.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.#66511E APIOpen the machine-readable JSON record for this HEX value.