Colors Encyclopedia

HEX atlas value

#639603

#639603 is a cool green HEX color close to Avocado. According to Colors Encyclopedia, it converts to RGB 99, 150, 3, HSL 81, 96%, 30%, has luminance 0.2447, and belongs to the jewel tone group.

greencooljewel-tone
#639603 Sample readable text
HEX #639603
RGB rgb(99, 150, 3)
HSL hsl(81 96% 30%)
CMYK cmyk(34, 0, 98, 41)
Luminance 0.2447
Contrast Black 5.89:1White 3.56:1

CSS

--color-639603: #639603;
.background-639603 { background-color: #639603; }
.text-639603 { color: #639603; }

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
Luminance0.2447
Black text5.89:1AA Pass
White text3.56:1AA 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":"#639603","rgb":[99,150,3],"hsl":[81,96,30],"cmyk":[34,0,98,41],"luminance":0.2447,"contrast":{"black":5.89,"white":3.56}}
WCAG
{"AA":["#000000","#1A1A1A"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":5.89,"wcagAA":true,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":3.56,"wcagAA":false,"wcagAAA":false}]
Accessible alternatives
[{"name":"#9EF005","hex":"#9EF005","family":"green","bestTextColor":"#000000","contrastBlack":14.92,"contrastWhite":1.41,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#360396","hex":"#360396","family":"purple","bestTextColor":"#FFFFFF","contrastBlack":1.61,"contrastWhite":13.04,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#273C01","hex":"#273C01","family":"green","bestTextColor":"#FFFFFF","contrastBlack":1.73,"contrastWhite":12.11,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#639900","hex":"#639900","family":"green","bestTextColor":"#000000","contrastBlack":6.09,"contrastWhite":3.45,"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","jewel tone","jewel tone green","Avocado adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","rich accent palettes","botanical and wellness palettes"],"contrastSafeWith":["#000000","#1A1A1A"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/639603.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/avocado.json","https://www.colorsencyclopedia.com/api/colors/scheeles-green.json","https://www.colorsencyclopedia.com/api/colors/olive-drab.json"]}
Harmonies
{"complementary":"#360396","analogous":["#968003","#199603"],"triadic":["#036396","#960363"],"tetradic":["#039680","#360396","#960319"],"splitComplementary":["#031996","#800396"],"monochromatic":["#9EF005","#639603","#273C01"]}
Variants
{"light":"#9EF005","dark":"#273C01","saturated":"#639900","desaturated":"#5D8514","pastel":"#A8E92F","neon":"#7EC200"}
Nearest named colors
[{"slug":"avocado","name":"Avocado","hex":"#568203","distance":23.853720883753127},{"slug":"scheeles-green","name":"Scheele Green","hex":"#478800","distance":31.448370387032774},{"slug":"olive-drab","name":"Olive Drab","hex":"#6B8E23","distance":33.94112549695428},{"slug":"olive-leaf","name":"Olive Leaf","hex":"#6B8E23","distance":33.94112549695428},{"slug":"olive","name":"Olive","hex":"#808000","distance":36.52396473549935}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #639603

#639603 is classified as a cool green value with jewel tone visual character. #639603 is visually closest to Avocado, a named green color with HEX #568203.

The RGB channels are 99, 150, and 3, with green carrying the strongest channel weight. In HSL, the hue is 81deg with 96% saturation and 30% lightness, so this page treats it as a high-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 rich accent palettes. Its luminance is 0.2447, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 23.85, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text5.89:1AA Pass
White text3.56:1AA Fail

AA text options: #000000, #1A1A1A.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #639603 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000005.89:1 · AA
White text#FFFFFF3.56:1 · Fail

Accessible Alternatives

#9EF005#000000 text · best 14.92:1#9EF005
#360396#FFFFFF text · best 13.04:1#360396
#273C01#FFFFFF text · best 12.11:1#273C01
#639900#000000 text · best 6.09:1#639900
Olive Leaf#000000 text · best 5.52:1#6B8E23

Generated Palette

#639603#639603
#360396#360396
#968003#968003
#199603#199603
#9EF005#9EF005
#273C01#273C01

Color Harmonies

#360396#360396
#968003#968003
#199603#199603
#036396#036396
#960363#960363

Variants

#9EF005#9EF005
#273C01#273C01
#639900#639900
#5D8514#5D8514
#A8E92F#A8E92F
#7EC200#7EC200

Nearest Named Colors

Avocado#568203
Scheele Green#478800
Olive Drab#6B8E23
Olive Leaf#6B8E23
Olive#808000

Related HEX Guides

Avocado colorOpen the nearest named color reference for #568203.Scheele Green colorOpen the nearest named color reference for #478800.Olive Drab 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.Jewel Tone colorsFind colors in the jewel 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.#639603 APIOpen the machine-readable JSON record for this HEX value.