Colors Encyclopedia

HEX atlas value

#663B1E

#663B1E is a warm orange HEX color close to Bark. According to Colors Encyclopedia, it converts to RGB 102, 59, 30, HSL 24, 55%, 26%, has luminance 0.0605, and belongs to the earth tone group.

orangewarmearth-tone
#663B1E Sample readable text
HEX #663B1E
RGB rgb(102, 59, 30)
HSL hsl(24 55% 26%)
CMYK cmyk(0, 42, 71, 60)
Luminance 0.0605
Contrast Black 2.21:1White 9.5:1

CSS

--color-663b1e: #663B1E;
.background-663b1e { background-color: #663B1E; }
.text-663b1e { color: #663B1E; }

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
Luminance0.0605
Black text2.21:1AA Fail
White text9.5:1AA 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
Download JSON Open API
Structured sections
Color systems
{"hex":"#663B1E","rgb":[102,59,30],"hsl":[24,55,26],"cmyk":[0,42,71,60],"luminance":0.0605,"contrast":{"black":2.21,"white":9.5}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":["#FFFFFF","#F5F5F5"]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":2.21,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":9.5,"wcagAA":true,"wcagAAA":true}]
Accessible alternatives
[{"name":"#201209","hex":"#201209","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":1.15,"contrastWhite":18.23,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#671E25","hex":"#671E25","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.79,"contrastWhite":11.73,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Espresso","hex":"#4B3621","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":1.85,"contrastWhite":11.36,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Bark","hex":"#5B3A29","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.08,"contrastWhite":10.09,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#583E2C","hex":"#583E2C","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.14,"contrastWhite":9.81,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]
AI context
{"semanticGroups":["warm orange","earth tone","earth tone orange","Bark adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","natural palettes"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/663b1e.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/bark.json","https://www.colorsencyclopedia.com/api/colors/sepia.json","https://www.colorsencyclopedia.com/api/colors/walnut.json"]}
Harmonies
{"complementary":"#1E4A67","analogous":["#671E25","#675F1E"],"triadic":["#1E673B","#3B1E67"],"tetradic":["#25671E","#1E4A67","#5F1E67"],"splitComplementary":["#1E675F","#1E2567"],"monochromatic":["#AE6432","#663B1E","#201209"]}
Variants
{"light":"#AE6432","dark":"#201209","saturated":"#75380F","desaturated":"#583E2C","pastel":"#B47850","neon":"#AD4500"}
Nearest named colors
[{"slug":"bark","name":"Bark","hex":"#5B3A29","distance":15.588457268119896},{"slug":"sepia","name":"Sepia","hex":"#704214","distance":15.7797338380595},{"slug":"walnut","name":"Walnut","hex":"#5C4033","distance":23.790754506740637},{"slug":"garnet","name":"Garnet","hex":"#733635","distance":26.888659319497503},{"slug":"espresso","name":"Espresso","hex":"#4B3621","distance":27.622454633866266}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #663B1E

#663B1E is classified as a warm orange value with earth tone visual character. #663B1E is visually closest to Bark, a named orange color with HEX #5B3A29.

The RGB channels are 102, 59, and 30, with red carrying the strongest channel weight. In HSL, the hue is 24deg with 55% saturation and 26% 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 0.0605, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 15.59, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text2.21:1AA Fail
White text9.5:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #663B1E needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000002.21:1 · Fail
White text#FFFFFF9.5:1 · AAA

Accessible Alternatives

#201209#FFFFFF text · best 18.23:1#201209
#671E25#FFFFFF text · best 11.73:1#671E25
Espresso#FFFFFF text · best 11.36:1#4B3621
Bark#FFFFFF text · best 10.09:1#5B3A29
#583E2C#FFFFFF text · best 9.81:1#583E2C

Generated Palette

#663B1E#663B1E
#1E4A67#1E4A67
#671E25#671E25
#675F1E#675F1E
#AE6432#AE6432
#201209#201209

Color Harmonies

#1E4A67#1E4A67
#671E25#671E25
#675F1E#675F1E
#1E673B#1E673B
#3B1E67#3B1E67

Variants

#AE6432#AE6432
#201209#201209
#75380F#75380F
#583E2C#583E2C
#B47850#B47850
#AD4500#AD4500

Nearest Named Colors

Bark#5B3A29
Sepia#704214
Walnut#5C4033
Garnet#733635
Espresso#4B3621

Related HEX Guides

Bark colorOpen the nearest named color reference for #5B3A29.Sepia colorOpen the nearest named color reference for #704214.Walnut colorOpen the nearest named color reference for #5C4033.Orange color familyBrowse named orange colors related to this HEX value.Warm 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.#663B1E APIOpen the machine-readable JSON record for this HEX value.