Colors Encyclopedia

HEX atlas value

#668A38

#668A38 is a cool green HEX color close to Olive Green. According to Colors Encyclopedia, it converts to RGB 102, 138, 56, HSL 86, 42%, 38%, has luminance 0.2129, and belongs to the earth tone group.

greencoolearth-tone
#668A38 Sample readable text
HEX #668A38
RGB rgb(102, 138, 56)
HSL hsl(86 42% 38%)
CMYK cmyk(26, 0, 59, 46)
Luminance 0.2129
Contrast Black 5.26:1White 3.99:1

CSS

--color-668a38: #668A38;
.background-668a38 { background-color: #668A38; }
.text-668a38 { color: #668A38; }

Machine-readable data

Machine-Readable HEX Data (JSON)

Structured HEX color data for conversion, WCAG checks, CSS generation, automation, and AI ingestion.

AI-Ready Dataset v1.0.0
Luminance0.2129
Black text5.26:1AA Pass
White text3.99:1AA 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
Download JSON Open API
Structured sections
Color systems
{"hex":"#668A38","rgb":[102,138,56],"hsl":[86,42,38],"cmyk":[26,0,59,46],"luminance":0.2129,"contrast":{"black":5.26,"white":3.99}}
WCAG
{"AA":["#000000"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":5.26,"wcagAA":true,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":3.99,"wcagAA":false,"wcagAAA":false}]
Accessible alternatives
[{"name":"#36481E","hex":"#36481E","family":"green","bestTextColor":"#FFFFFF","contrastBlack":2.1,"contrastWhite":9.99,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#95BE60","hex":"#95BE60","family":"green","bestTextColor":"#000000","contrastBlack":9.81,"contrastWhite":2.14,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#5B388A","hex":"#5B388A","family":"purple","bestTextColor":"#FFFFFF","contrastBlack":2.38,"contrastWhite":8.83,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#699F23","hex":"#699F23","family":"green","bestTextColor":"#000000","contrastBlack":6.58,"contrastWhite":3.19,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]},{"name":"Olive Leaf","hex":"#6B8E23","family":"green","bestTextColor":"#000000","contrastBlack":5.52,"contrastWhite":3.81,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]}]
AI context
{"semanticGroups":["cool green","earth tone","earth tone green","Olive Green adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","natural palettes","botanical and wellness palettes"],"contrastSafeWith":["#000000"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/668a38.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/olive-green.json","https://www.colorsencyclopedia.com/api/colors/olive-drab.json","https://www.colorsencyclopedia.com/api/colors/olive-leaf.json"]}
Harmonies
{"complementary":"#5B388A","analogous":["#8A8438","#3E8A38"],"triadic":["#38668A","#8A3866"],"tetradic":["#388A84","#5B388A","#8A383E"],"splitComplementary":["#383E8A","#84388A"],"monochromatic":["#95BE60","#668A38","#36481E"]}
Variants
{"light":"#95BE60","dark":"#36481E","saturated":"#699F23","desaturated":"#63744E","pastel":"#A4BA87","neon":"#85EB00"}
Nearest named colors
[{"slug":"olive-green","name":"Olive Green","hex":"#708238","distance":12.806248474865697},{"slug":"olive-drab","name":"Olive Drab","hex":"#6B8E23","distance":21.95449840010015},{"slug":"olive-leaf","name":"Olive Leaf","hex":"#6B8E23","distance":21.95449840010015},{"slug":"fern-green","name":"Fern Green","hex":"#4F7942","distance":30.298514815086232},{"slug":"fern-frond","name":"Fern Frond","hex":"#657220","distance":33.95585369269929}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #668A38

#668A38 is classified as a cool green value with earth tone visual character. #668A38 is visually closest to Olive Green, a named green color with HEX #708238.

The RGB channels are 102, 138, and 56, with green carrying the strongest channel weight. In HSL, the hue is 86deg with 42% saturation and 38% lightness, so this page treats it as a moderate-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 natural palettes. Its luminance is 0.2129, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 12.81, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text5.26:1AA Pass
White text3.99:1AA Fail

AA text options: #000000.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #668A38 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000005.26:1 · AA
White text#FFFFFF3.99:1 · Fail

Accessible Alternatives

#36481E#FFFFFF text · best 9.99:1#36481E
#95BE60#000000 text · best 9.81:1#95BE60
#5B388A#FFFFFF text · best 8.83:1#5B388A
#699F23#000000 text · best 6.58:1#699F23
Olive Leaf#000000 text · best 5.52:1#6B8E23

Generated Palette

#668A38#668A38
#5B388A#5B388A
#8A8438#8A8438
#3E8A38#3E8A38
#95BE60#95BE60
#36481E#36481E

Color Harmonies

#5B388A#5B388A
#8A8438#8A8438
#3E8A38#3E8A38
#38668A#38668A
#8A3866#8A3866

Variants

#95BE60#95BE60
#36481E#36481E
#699F23#699F23
#63744E#63744E
#A4BA87#A4BA87
#85EB00#85EB00

Nearest Named Colors

Olive Green#708238
Olive Drab#6B8E23
Olive Leaf#6B8E23
Fern Green#4F7942
Fern Frond#657220

Related HEX Guides

Olive Green colorOpen the nearest named color reference for #708238.Olive Drab colorOpen the nearest named color reference for #6B8E23.Olive Leaf colorOpen the nearest named color reference for #6B8E23.Green color familyBrowse named green colors related to this HEX value.Cool colorsExplore colors with similar temperature behavior.Earth Tone colorsFind colors in the earth tone group.Color palettesBrowse palette systems related to generated color combinations.Compare colorsCompare named colors near this HEX value.Accessible colorsBrowse WCAG-friendly named colors and safe text options.#668A38 APIOpen the machine-readable JSON record for this HEX value.