HEX atlas value

#646647

#646647 is a warm yellow HEX color close to Umber. According to Colors Encyclopedia, it converts to RGB 100, 102, 71, HSL 64, 18%, 34%, has luminance 0.1267, and belongs to the muted and earth tone groups.

yellow warm muted earth-tone

#646647 Sample readable text

HEX #646647

RGB rgb(100, 102, 71)

HSL hsl(64 18% 34%)

CMYK cmyk(2, 0, 30, 60)

Luminance 0.1267

Contrast Black 3.53:1White 5.94:1

CSS

--color-646647: #646647;
.background-646647 { background-color: #646647; }
.text-646647 { color: #646647; }

Luminance0.1267

Black text3.53:1AA Fail

White text5.94:1AA 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":"#646647","rgb":[100,102,71],"hsl":[64,18,34],"cmyk":[2,0,30,60],"luminance":0.1267,"contrast":{"black":3.53,"white":5.94}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":3.53,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":5.94,"wcagAA":true,"wcagAAA":false}]

Accessible alternatives

[{"name":"#2F3021","hex":"#2F3021","family":"yellow","bestTextColor":"#FFFFFF","contrastBlack":1.57,"contrastWhite":13.41,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#494766","hex":"#494766","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":2.38,"contrastWhite":8.84,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Umber","hex":"#635147","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.8,"contrastWhite":7.51,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"Loam","hex":"#6B4F3A","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.8,"contrastWhite":7.49,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"#989B6F","hex":"#989B6F","family":"yellow","bestTextColor":"#000000","contrastBlack":7.25,"contrastWhite":2.89,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]}]

AI context

{"semanticGroups":["warm yellow","muted","earth tone","muted yellow","earth tone yellow","Umber adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","muted interface themes","natural palettes","highlight and warning systems"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/646647.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/umber.json","https://www.colorsencyclopedia.com/api/colors/cactus-green.json","https://www.colorsencyclopedia.com/api/colors/loam.json"]}

Harmonies

{"complementary":"#494766","analogous":["#665947","#556647"],"triadic":["#476466","#664764"],"tetradic":["#476659","#494766","#664755"],"splitComplementary":["#475566","#594766"],"monochromatic":["#989B6F","#646647","#2F3021"]}

Variants

{"light":"#989B6F","dark":"#2F3021","saturated":"#757934","desaturated":"#575757","pastel":"#999A93","neon":"#C8D600"}

Nearest named colors

[{"slug":"umber","name":"Umber","hex":"#635147","distance":21.02379604162864},{"slug":"cactus-green","name":"Cactus Green","hex":"#587156","distance":22.135943621178654},{"slug":"loam","name":"Loam","hex":"#6B4F3A","distance":27.331300737432898},{"slug":"dark-olive-green","name":"Dark Olive Green","hex":"#556B2F","distance":28.74021572639983},{"slug":"fern-green","name":"Fern Green","hex":"#4F7942","distance":28.75760768909681}]

HEX meaning and use

About #646647

#646647 is classified as a warm yellow value with muted and earth tone visual character. #646647 is visually closest to Umber, a named orange color with HEX #635147.

The RGB channels are 100, 102, and 71, with green carrying the strongest channel weight. In HSL, the hue is 64deg with 18% saturation and 34% 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 muted interface themes. Its luminance is 0.1267, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 21.02, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.53:1AA Fail

White text5.94:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #646647 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.53:1 · Fail

White text#FFFFFF5.94:1 · AA

Accessible Alternatives

#2F3021#FFFFFF text · best 13.41:1#2F3021

#494766#FFFFFF text · best 8.84:1#494766

Umber#FFFFFF text · best 7.51:1#635147

Loam#FFFFFF text · best 7.49:1#6B4F3A

#989B6F#000000 text · best 7.25:1#989B6F

Generated Palette

#646647#646647

#494766#494766

#665947#665947

#556647#556647

#989B6F#989B6F

#2F3021#2F3021

Color Harmonies

#494766#494766

#665947#665947

#556647#556647

#476466#476466

#664764#664764

Variants

#989B6F#989B6F

#2F3021#2F3021

#757934#757934

#575757#575757

#999A93#999A93

#C8D600#C8D600

Nearest Named Colors

Umber#635147

Cactus Green#587156

Loam#6B4F3A

Dark Olive Green#556B2F

Fern Green#4F7942

#646647

CSS

Machine-Readable HEX Data (JSON)

About #646647

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides