HEX atlas value

#646D2C

#646D2C is a warm yellow HEX color close to Fern Frond. According to Colors Encyclopedia, it converts to RGB 100, 109, 44, HSL 68, 42%, 30%, has luminance 0.1383, and belongs to the earth tone group.

yellow warm earth-tone

#646D2C Sample readable text

HEX #646D2C

RGB rgb(100, 109, 44)

HSL hsl(68 42% 30%)

CMYK cmyk(8, 0, 60, 57)

Luminance 0.1383

Contrast Black 3.77:1White 5.58:1

CSS

--color-646d2c: #646D2C;
.background-646d2c { background-color: #646D2C; }
.text-646d2c { color: #646D2C; }

Luminance0.1383

Black text3.77:1AA Fail

White text5.58:1AA 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":"#646D2C","rgb":[100,109,44],"hsl":[68,42,30],"cmyk":[8,0,60,57],"luminance":0.1383,"contrast":{"black":3.77,"white":5.58}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":3.77,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":5.58,"wcagAA":true,"wcagAAA":false}]

Accessible alternatives

[{"name":"#282B12","hex":"#282B12","family":"yellow","bestTextColor":"#FFFFFF","contrastBlack":1.44,"contrastWhite":14.54,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#352C6D","hex":"#352C6D","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.73,"contrastWhite":12.12,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#A0AE47","hex":"#A0AE47","family":"yellow","bestTextColor":"#000000","contrastBlack":8.64,"contrastWhite":2.43,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Moss Deep","hex":"#4A5D23","family":"green","bestTextColor":"#FFFFFF","contrastBlack":2.88,"contrastWhite":7.29,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"#6D552C","hex":"#6D552C","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.99,"contrastWhite":7.03,"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/646d2c.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/olive-green.json"]}

Harmonies

{"complementary":"#352C6D","analogous":["#6D552C","#446D2C"],"triadic":["#2C646D","#6D2C64"],"tetradic":["#2C6D55","#352C6D","#6D2C44"],"splitComplementary":["#2C446D","#552C6D"],"monochromatic":["#A0AE47","#646D2C","#282B12"]}

Variants

{"light":"#A0AE47","dark":"#282B12","saturated":"#707D1C","desaturated":"#585C3D","pastel":"#A3AB6D","neon":"#A8C200"}

Nearest named colors

[{"slug":"fern-frond","name":"Fern Frond","hex":"#657220","distance":13.038404810405298},{"slug":"dark-olive-green","name":"Dark Olive Green","hex":"#556B2F","distance":15.427248620541512},{"slug":"olive-green","name":"Olive Green","hex":"#708238","distance":27},{"slug":"moss-deep","name":"Moss Deep","hex":"#4A5D23","distance":31.827660925679098},{"slug":"fern-green","name":"Fern Green","hex":"#4F7942","distance":32.69556544854363}]

HEX meaning and use

About #646D2C

#646D2C is classified as a warm yellow value with earth tone visual character. #646D2C is visually closest to Fern Frond, a named green color with HEX #657220.

The RGB channels are 100, 109, and 44, with green carrying the strongest channel weight. In HSL, the hue is 68deg with 42% 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 0.1383, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 13.04, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.77:1AA Fail

White text5.58:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #646D2C needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.77:1 · Fail

White text#FFFFFF5.58:1 · AA

Accessible Alternatives

#282B12#FFFFFF text · best 14.54:1#282B12

#352C6D#FFFFFF text · best 12.12:1#352C6D

#A0AE47#000000 text · best 8.64:1#A0AE47

Moss Deep#FFFFFF text · best 7.29:1#4A5D23

#6D552C#FFFFFF text · best 7.03:1#6D552C

Generated Palette

#646D2C#646D2C

#352C6D#352C6D

#6D552C#6D552C

#446D2C#446D2C

#A0AE47#A0AE47

#282B12#282B12

Color Harmonies

#352C6D#352C6D

#6D552C#6D552C

#446D2C#446D2C

#2C646D#2C646D

#6D2C64#6D2C64

Variants

#A0AE47#A0AE47

#282B12#282B12

#707D1C#707D1C

#585C3D#585C3D

#A3AB6D#A3AB6D

#A8C200#A8C200

Nearest Named Colors

Fern Frond#657220

Dark Olive Green#556B2F

Olive Green#708238

Moss Deep#4A5D23

Fern Green#4F7942

#646D2C

CSS

Machine-Readable HEX Data (JSON)

About #646D2C

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides