HEX atlas value

#663C1E

#663C1E is a warm orange HEX color close to Sepia. According to Colors Encyclopedia, it converts to RGB 102, 60, 30, HSL 25, 55%, 26%, has luminance 0.0615, and belongs to the earth tone group.

orange warm earth-tone

#663C1E Sample readable text

HEX #663C1E

RGB rgb(102, 60, 30)

HSL hsl(25 55% 26%)

CMYK cmyk(0, 41, 71, 60)

Luminance 0.0615

Contrast Black 2.23:1White 9.42:1

CSS

--color-663c1e: #663C1E;
.background-663c1e { background-color: #663C1E; }
.text-663c1e { color: #663C1E; }

Luminance0.0615

Black text2.23:1AA Fail

White text9.42:1AA 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":"#663C1E","rgb":[102,60,30],"hsl":[25,55,26],"cmyk":[0,41,71,60],"luminance":0.0615,"contrast":{"black":2.23,"white":9.42}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":2.23,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":9.42,"wcagAA":true,"wcagAAA":true}]

Accessible alternatives

[{"name":"#201309","hex":"#201309","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":1.16,"contrastWhite":18.13,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#671E24","hex":"#671E24","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.79,"contrastWhite":11.74,"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":"#583F2C","hex":"#583F2C","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":2.16,"contrastWhite":9.71,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]

AI context

{"semanticGroups":["warm orange","earth tone","earth tone orange","Sepia adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","natural palettes"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/663c1e.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/sepia.json","https://www.colorsencyclopedia.com/api/colors/bark.json","https://www.colorsencyclopedia.com/api/colors/walnut.json"]}

Harmonies

{"complementary":"#1E4867","analogous":["#671E24","#67611E"],"triadic":["#1E673C","#3C1E67"],"tetradic":["#24671E","#1E4867","#611E67"],"splitComplementary":["#1E6761","#1E2467"],"monochromatic":["#AE6632","#663C1E","#201309"]}

Variants

{"light":"#AE6632","dark":"#201309","saturated":"#753A0F","desaturated":"#583F2C","pastel":"#B47A50","neon":"#AD4800"}

Nearest named colors

[{"slug":"sepia","name":"Sepia","hex":"#704214","distance":15.362291495737216},{"slug":"bark","name":"Bark","hex":"#5B3A29","distance":15.684387141358123},{"slug":"walnut","name":"Walnut","hex":"#5C4033","distance":23.600847442411894},{"slug":"garnet","name":"Garnet","hex":"#733635","distance":27.09243436828813},{"slug":"espresso","name":"Espresso","hex":"#4B3621","distance":27.820855486487112}]

HEX meaning and use

About #663C1E

#663C1E is classified as a warm orange value with earth tone visual character. #663C1E is visually closest to Sepia, a named orange color with HEX #704214.

The RGB channels are 102, 60, and 30, with red carrying the strongest channel weight. In HSL, the hue is 25deg 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 0.0615, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 15.36, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text2.23:1AA Fail

White text9.42:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #663C1E needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000002.23:1 · Fail

White text#FFFFFF9.42:1 · AAA

Accessible Alternatives

#201309#FFFFFF text · best 18.13:1#201309

#671E24#FFFFFF text · best 11.74:1#671E24

Espresso#FFFFFF text · best 11.36:1#4B3621

Bark#FFFFFF text · best 10.09:1#5B3A29

#583F2C#FFFFFF text · best 9.71:1#583F2C

Generated Palette

#663C1E#663C1E

#1E4867#1E4867

#671E24#671E24

#67611E#67611E

#AE6632#AE6632

#201309#201309

Color Harmonies

#1E4867#1E4867

#671E24#671E24

#67611E#67611E

#1E673C#1E673C

#3C1E67#3C1E67

Variants

#AE6632#AE6632

#201309#201309

#753A0F#753A0F

#583F2C#583F2C

#B47A50#B47A50

#AD4800#AD4800

Nearest Named Colors

Sepia#704214

Bark#5B3A29

Walnut#5C4033

Garnet#733635

Espresso#4B3621

#663C1E

CSS

Machine-Readable HEX Data (JSON)

About #663C1E

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides