HEX atlas value

#638551

#638551 is a cool green HEX color close to Epoxy Green. According to Colors Encyclopedia, it converts to RGB 99, 133, 81, HSL 99, 24%, 42%, has luminance 0.2002, and belongs to the muted and earth tone groups.

green cool muted earth-tone

#638551 Sample readable text

HEX #638551

RGB rgb(99, 133, 81)

HSL hsl(99 24% 42%)

CMYK cmyk(26, 0, 39, 48)

Luminance 0.2002

Contrast Black 5:1White 4.2:1

CSS

--color-638551: #638551;
.background-638551 { background-color: #638551; }
.text-638551 { color: #638551; }

Luminance0.2002

Black text5:1AA Pass

White text4.2:1AA Fail

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":"#638551","rgb":[99,133,81],"hsl":[99,24,42],"cmyk":[26,0,39,48],"luminance":0.2002,"contrast":{"black":5,"white":4.2}}

WCAG

{"AA":["#000000"],"AAA":[]}

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":5,"wcagAA":true,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":4.2,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#394C2F","hex":"#394C2F","family":"green","bestTextColor":"#FFFFFF","contrastBlack":2.25,"contrastWhite":9.34,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#92B181","hex":"#92B181","family":"green","bestTextColor":"#000000","contrastBlack":8.83,"contrastWhite":2.38,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#735185","hex":"#735185","family":"purple","bestTextColor":"#FFFFFF","contrastBlack":3.24,"contrastWhite":6.47,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":[]},{"name":"#5C9C3A","hex":"#5C9C3A","family":"green","bestTextColor":"#000000","contrastBlack":6.27,"contrastWhite":3.35,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]},{"name":"Cactus Green","hex":"#587156","family":"green","bestTextColor":"#FFFFFF","contrastBlack":3.91,"contrastWhite":5.37,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":[]}]

AI context

{"semanticGroups":["cool green","muted","earth tone","muted green","earth tone green","Epoxy Green adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","muted interface themes","natural palettes","botanical and wellness palettes"],"contrastSafeWith":["#000000"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/638551.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/epoxy-green.json","https://www.colorsencyclopedia.com/api/colors/cactus-green.json","https://www.colorsencyclopedia.com/api/colors/fern-green.json"]}

Harmonies

{"complementary":"#735185","analogous":["#7D8551","#518559"],"triadic":["#516385","#855163"],"tetradic":["#517D85","#735185","#855951"],"splitComplementary":["#595185","#85517D"],"monochromatic":["#92B181","#638551","#394C2F"]}

Variants

{"light":"#92B181","dark":"#394C2F","saturated":"#5C9C3A","desaturated":"#6A6D69","pastel":"#A9B2A3","neon":"#59FF00"}

Nearest named colors

[{"slug":"epoxy-green","name":"Epoxy Green","hex":"#4E8A57","distance":22.40535650240808},{"slug":"cactus-green","name":"Cactus Green","hex":"#587156","distance":23.366642891095847},{"slug":"fern-green","name":"Fern Green","hex":"#4F7942","distance":27.730849247724095},{"slug":"olive-green","name":"Olive Green","hex":"#708238","distance":28.337254630609507},{"slug":"eucalyptus","name":"Eucalyptus","hex":"#5F8575","distance":36.22154055254967}]

HEX meaning and use

About #638551

#638551 is classified as a cool green value with muted and earth tone visual character. #638551 is visually closest to Epoxy Green, a named green color with HEX #4E8A57.

The RGB channels are 99, 133, and 81, with green carrying the strongest channel weight. In HSL, the hue is 99deg with 24% saturation and 42% 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 0.2002, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 22.41, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text5:1AA Pass

White text4.2:1AA Fail

AA text options: #000000.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #638551 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000005:1 · AA

White text#FFFFFF4.2:1 · Fail

Accessible Alternatives

#394C2F#FFFFFF text · best 9.34:1#394C2F

#92B181#000000 text · best 8.83:1#92B181

#735185#FFFFFF text · best 6.47:1#735185

#5C9C3A#000000 text · best 6.27:1#5C9C3A

Cactus Green#FFFFFF text · best 5.37:1#587156

Generated Palette

#638551#638551

#735185#735185

#7D8551#7D8551

#518559#518559

#92B181#92B181

#394C2F#394C2F

Color Harmonies

#735185#735185

#7D8551#7D8551

#518559#518559

#516385#516385

#855163#855163

Variants

#92B181#92B181

#394C2F#394C2F

#5C9C3A#5C9C3A

#6A6D69#6A6D69

#A9B2A3#A9B2A3

#59FF00#59FF00

Nearest Named Colors

Epoxy Green#4E8A57

Cactus Green#587156

Fern Green#4F7942

Olive Green#708238

Eucalyptus#5F8575

#638551

CSS

Machine-Readable HEX Data (JSON)

About #638551

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides