HEX atlas value

#63661E

#63661E is a warm yellow HEX color close to Fern Frond. According to Colors Encyclopedia, it converts to RGB 99, 102, 30, HSL 62, 55%, 26%, has luminance 0.1225, and belongs to the earth tone group.

yellow warm earth-tone

#63661E Sample readable text

HEX #63661E

RGB rgb(99, 102, 30)

HSL hsl(62 55% 26%)

CMYK cmyk(3, 0, 71, 60)

Luminance 0.1225

Contrast Black 3.45:1White 6.09:1

CSS

--color-63661e: #63661E;
.background-63661e { background-color: #63661E; }
.text-63661e { color: #63661E; }

Luminance0.1225

Black text3.45:1AA Fail

White text6.09:1AA 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":"#63661E","rgb":[99,102,30],"hsl":[62,55,26],"cmyk":[3,0,71,60],"luminance":0.1225,"contrast":{"black":3.45,"white":6.09}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":3.45,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":6.09,"wcagAA":true,"wcagAAA":false}]

Accessible alternatives

[{"name":"#1F2009","hex":"#1F2009","family":"yellow","bestTextColor":"#FFFFFF","contrastBlack":1.27,"contrastWhite":16.56,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#201E67","hex":"#201E67","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.44,"contrastWhite":14.56,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#AAAE32","hex":"#AAAE32","family":"yellow","bestTextColor":"#000000","contrastBlack":8.81,"contrastWhite":2.38,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#67451E","hex":"#67451E","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.45,"contrastWhite":8.59,"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","Fern Frond 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/63661e.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/fern-frond.json","https://www.colorsencyclopedia.com/api/colors/dark-olive-green.json","https://www.colorsencyclopedia.com/api/colors/moss-deep.json"]}

Harmonies

{"complementary":"#201E67","analogous":["#67451E","#40671E"],"triadic":["#1E6467","#671E64"],"tetradic":["#1E6745","#201E67","#671E40"],"splitComplementary":["#1E4067","#451E67"],"monochromatic":["#AAAE32","#63661E","#1F2009"]}

Variants

{"light":"#AAAE32","dark":"#1F2009","saturated":"#72750F","desaturated":"#57582C","pastel":"#B1B450","neon":"#A8AD00"}

Nearest named colors

[{"slug":"fern-frond","name":"Fern Frond","hex":"#657220","distance":12.328828005937952},{"slug":"dark-olive-green","name":"Dark Olive Green","hex":"#556B2F","distance":22.58317958127243},{"slug":"moss-deep","name":"Moss Deep","hex":"#4A5D23","distance":27.03701166919155},{"slug":"coffee","name":"Coffee","hex":"#6F4E37","distance":36.6742416417845},{"slug":"loam","name":"Loam","hex":"#6B4F3A","distance":37.107950630558946}]

HEX meaning and use

About #63661E

#63661E is classified as a warm yellow value with earth tone visual character. #63661E is visually closest to Fern Frond, a named green color with HEX #657220.

The RGB channels are 99, 102, and 30, with green carrying the strongest channel weight. In HSL, the hue is 62deg 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 0.1225, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 12.33, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.45:1AA Fail

White text6.09:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #63661E needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.45:1 · Fail

White text#FFFFFF6.09:1 · AA

Accessible Alternatives

#1F2009#FFFFFF text · best 16.56:1#1F2009

#201E67#FFFFFF text · best 14.56:1#201E67

#AAAE32#000000 text · best 8.81:1#AAAE32

#67451E#FFFFFF text · best 8.59:1#67451E

Loam#FFFFFF text · best 7.49:1#6B4F3A

Generated Palette

#63661E#63661E

#201E67#201E67

#67451E#67451E

#40671E#40671E

#AAAE32#AAAE32

#1F2009#1F2009

Color Harmonies

#201E67#201E67

#67451E#67451E

#40671E#40671E

#1E6467#1E6467

#671E64#671E64

Variants

#AAAE32#AAAE32

#1F2009#1F2009

#72750F#72750F

#57582C#57582C

#B1B450#B1B450

#A8AD00#A8AD00

Nearest Named Colors

Fern Frond#657220

Dark Olive Green#556B2F

Moss Deep#4A5D23

Coffee#6F4E37

Loam#6B4F3A

#63661E

CSS

Machine-Readable HEX Data (JSON)

About #63661E

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides