HEX atlas value

#637128

#637128 is a cool green HEX color close to Fern Frond. According to Colors Encyclopedia, it converts to RGB 99, 113, 40, HSL 72, 48%, 30%, has luminance 0.1462, and belongs to the earth tone and jewel tone groups.

green cool earth-tone jewel-tone

#637128 Sample readable text

HEX #637128

RGB rgb(99, 113, 40)

HSL hsl(72 48% 30%)

CMYK cmyk(12, 0, 65, 56)

Luminance 0.1462

Contrast Black 3.92:1White 5.35:1

CSS

--color-637128: #637128;
.background-637128 { background-color: #637128; }
.text-637128 { color: #637128; }

Luminance0.1462

Black text3.92:1AA Fail

White text5.35:1AA 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":"#637128","rgb":[99,113,40],"hsl":[72,48,30],"cmyk":[12,0,65,56],"luminance":0.1462,"contrast":{"black":3.92,"white":5.35}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":3.92,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":5.35,"wcagAA":true,"wcagAAA":false}]

Accessible alternatives

[{"name":"#272D10","hex":"#272D10","family":"green","bestTextColor":"#FFFFFF","contrastBlack":1.47,"contrastWhite":14.29,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#362871","hex":"#362871","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.7,"contrastWhite":12.37,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#9EB540","hex":"#9EB540","family":"green","bestTextColor":"#000000","contrastBlack":9.14,"contrastWhite":2.3,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#586039","hex":"#586039","family":"green","bestTextColor":"#FFFFFF","contrastBlack":3.15,"contrastWhite":6.67,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":[]},{"name":"#715B28","hex":"#715B28","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":3.23,"contrastWhite":6.5,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":[]}]

AI context

{"semanticGroups":["cool green","earth tone","jewel tone","earth tone green","jewel tone green","Fern Frond adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","natural palettes","rich accent palettes","botanical and wellness palettes"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/637128.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":"#362871","analogous":["#715B28","#3E7128"],"triadic":["#286371","#712863"],"tetradic":["#28715B","#362871","#71283E"],"splitComplementary":["#283E71","#5B2871"],"monochromatic":["#9EB540","#637128","#272D10"]}

Variants

{"light":"#9EB540","dark":"#272D10","saturated":"#6D8217","desaturated":"#586039","pastel":"#A3B266","neon":"#9BC200"}

Nearest named colors

[{"slug":"fern-frond","name":"Fern Frond","hex":"#657220","distance":8.306623862918075},{"slug":"dark-olive-green","name":"Dark Olive Green","hex":"#556B2F","distance":16.76305461424021},{"slug":"olive-green","name":"Olive Green","hex":"#708238","distance":26.720778431774775},{"slug":"olive-drab","name":"Olive Drab","hex":"#6B8E23","distance":30.495901363953813},{"slug":"olive-leaf","name":"Olive Leaf","hex":"#6B8E23","distance":30.495901363953813}]

HEX meaning and use

About #637128

#637128 is classified as a cool green value with earth tone and jewel tone visual character. #637128 is visually closest to Fern Frond, a named green color with HEX #657220.

The RGB channels are 99, 113, and 40, with green carrying the strongest channel weight. In HSL, the hue is 72deg with 48% 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 0.1462, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 8.31, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.92:1AA Fail

White text5.35:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #637128 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.92:1 · Fail

White text#FFFFFF5.35:1 · AA

Accessible Alternatives

#272D10#FFFFFF text · best 14.29:1#272D10

#362871#FFFFFF text · best 12.37:1#362871

#9EB540#000000 text · best 9.14:1#9EB540

#586039#FFFFFF text · best 6.67:1#586039

#715B28#FFFFFF text · best 6.5:1#715B28

Generated Palette

#637128#637128

#362871#362871

#715B28#715B28

#3E7128#3E7128

#9EB540#9EB540

#272D10#272D10

Color Harmonies

#362871#362871

#715B28#715B28

#3E7128#3E7128

#286371#286371

#712863#712863

Variants

#9EB540#9EB540

#272D10#272D10

#6D8217#6D8217

#586039#586039

#A3B266#A3B266

#9BC200#9BC200

Nearest Named Colors

Fern Frond#657220

Dark Olive Green#556B2F

Olive Green#708238

Olive Drab#6B8E23

Olive Leaf#6B8E23

#637128

CSS

Machine-Readable HEX Data (JSON)

About #637128

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides