HEX atlas value

#666831

#666831 is a warm yellow HEX color close to Dark Olive Green. According to Colors Encyclopedia, it converts to RGB 102, 104, 49, HSL 62, 36%, 30%, has luminance 0.1295, and belongs to the earth tone group.

yellow warm earth-tone

#666831 Sample readable text

HEX #666831

RGB rgb(102, 104, 49)

HSL hsl(62 36% 30%)

CMYK cmyk(2, 0, 53, 59)

Luminance 0.1295

Contrast Black 3.59:1White 5.85:1

CSS

--color-666831: #666831;
.background-666831 { background-color: #666831; }
.text-666831 { color: #666831; }

Luminance0.1295

Black text3.59:1AA Fail

White text5.85:1AA 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

Structured sections

Color systems

{"hex":"#666831","rgb":[102,104,49],"hsl":[62,36,30],"cmyk":[2,0,53,59],"luminance":0.1295,"contrast":{"black":3.59,"white":5.85}}

WCAG

{"AA":["#FFFFFF","#F5F5F5"],"AAA":[]}

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":3.59,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":5.85,"wcagAA":true,"wcagAAA":false}]

Accessible alternatives

[{"name":"#292A14","hex":"#292A14","family":"yellow","bestTextColor":"#FFFFFF","contrastBlack":1.44,"contrastWhite":14.62,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#333168","hex":"#333168","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.78,"contrastWhite":11.8,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#A4A64E","hex":"#A4A64E","family":"yellow","bestTextColor":"#000000","contrastBlack":8.14,"contrastWhite":2.58,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"#684E31","hex":"#684E31","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.72,"contrastWhite":7.71,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Loam","hex":"#6B4F3A","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.8,"contrastWhite":7.49,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]}]

AI context

{"semanticGroups":["warm yellow","earth tone","earth tone yellow","Dark Olive Green adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","natural palettes","highlight and warning systems"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/666831.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/dark-olive-green.json","https://www.colorsencyclopedia.com/api/colors/fern-frond.json","https://www.colorsencyclopedia.com/api/colors/loam.json"]}

Harmonies

{"complementary":"#333168","analogous":["#684E31","#4B6831"],"triadic":["#316668","#683166"],"tetradic":["#31684E","#333168","#68314B"],"splitComplementary":["#314B68","#4E3168"],"monochromatic":["#A4A64E","#666831","#292A14"]}

Variants

{"light":"#A4A64E","dark":"#292A14","saturated":"#767920","desaturated":"#565742","pastel":"#A3A474","neon":"#BBC200"}

Nearest named colors

[{"slug":"dark-olive-green","name":"Dark Olive Green","hex":"#556B2F","distance":17.378147196982766},{"slug":"fern-frond","name":"Fern Frond","hex":"#657220","distance":19.748417658131498},{"slug":"loam","name":"Loam","hex":"#6B4F3A","distance":27.03701166919155},{"slug":"coffee","name":"Coffee","hex":"#6F4E37","distance":28.160255680657446},{"slug":"olive-green","name":"Olive Green","hex":"#708238","distance":28.722813232690143}]

HEX meaning and use

About #666831

#666831 is classified as a warm yellow value with earth tone visual character. #666831 is visually closest to Dark Olive Green, a named green color with HEX #556B2F.

The RGB channels are 102, 104, and 49, with green carrying the strongest channel weight. In HSL, the hue is 62deg with 36% saturation and 30% 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 0.1295, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 17.38, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.59:1AA Fail

White text5.85:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #666831 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.59:1 · Fail

White text#FFFFFF5.85:1 · AA

Accessible Alternatives

#292A14#FFFFFF text · best 14.62:1#292A14

#333168#FFFFFF text · best 11.8:1#333168

#A4A64E#000000 text · best 8.14:1#A4A64E

#684E31#FFFFFF text · best 7.71:1#684E31

Loam#FFFFFF text · best 7.49:1#6B4F3A

Generated Palette

#666831#666831

#333168#333168

#684E31#684E31

#4B6831#4B6831

#A4A64E#A4A64E

#292A14#292A14

Color Harmonies

#333168#333168

#684E31#684E31

#4B6831#4B6831

#316668#316668

#683166#683166

Variants

#A4A64E#A4A64E

#292A14#292A14

#767920#767920

#565742#565742

#A3A474#A3A474

#BBC200#BBC200

Nearest Named Colors

Dark Olive Green#556B2F

Fern Frond#657220

Loam#6B4F3A

Coffee#6F4E37

Olive Green#708238

#666831

CSS

Machine-Readable HEX Data (JSON)

About #666831

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides