HEX atlas value

#403F08

#403F08 is a warm yellow HEX color close to Espresso. According to Colors Encyclopedia, it converts to RGB 64, 63, 8, HSL 59, 78%, 14%, has luminance 0.0466, and belongs to the dark group.

yellow warm dark

#403F08 Sample readable text

HEX #403F08

RGB rgb(64, 63, 8)

HSL hsl(59 78% 14%)

CMYK cmyk(0, 2, 88, 75)

Luminance 0.0466

Contrast Black 1.93:1White 10.87:1

CSS

--color-403f08: #403F08;
.background-403f08 { background-color: #403F08; }
.text-403f08 { color: #403F08; }

Luminance0.0466

Black text1.93:1AA Fail

White text10.87:1AA 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":"#403F08","rgb":[64,63,8],"hsl":[59,78,14],"cmyk":[0,2,88,75],"luminance":0.0466,"contrast":{"black":1.93,"white":10.87}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":1.93,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":10.87,"wcagAA":true,"wcagAAA":true}]

Accessible alternatives

[{"name":"Black","hex":"#000000","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1,"contrastWhite":21,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#080940","hex":"#080940","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.12,"contrastWhite":18.68,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#402308","hex":"#402308","family":"orange","bestTextColor":"#FFFFFF","contrastBlack":1.46,"contrastWhite":14.36,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Peat","hex":"#3B2F2F","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.63,"contrastWhite":12.85,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#383710","hex":"#383710","family":"yellow","bestTextColor":"#FFFFFF","contrastBlack":1.72,"contrastWhite":12.2,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]

AI context

{"semanticGroups":["warm yellow","dark","dark yellow","Espresso adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","dark theme accents","highlight and warning systems"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/403f08.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/espresso.json","https://www.colorsencyclopedia.com/api/colors/terre-verte.json","https://www.colorsencyclopedia.com/api/colors/pine-bark.json"]}

Harmonies

{"complementary":"#080940","analogous":["#402308","#254008"],"triadic":["#08403F","#3F0840"],"tetradic":["#084023","#080940","#400825"],"splitComplementary":["#082540","#230840"],"monochromatic":["#918F12","#403F08","#000000"]}

Variants

{"light":"#918F12","dark":"#000000","saturated":"#474600","desaturated":"#383710","pastel":"#A2A025","neon":"#706E00"}

Nearest named colors

[{"slug":"espresso","name":"Espresso","hex":"#4B3621","distance":28.75760768909681},{"slug":"terre-verte","name":"Terre Verte","hex":"#385E0F","distance":32.77193921634788},{"slug":"pine-bark","name":"Pine Bark","hex":"#4A3728","distance":34.46737587922817},{"slug":"moss-deep","name":"Moss Deep","hex":"#4A5D23","distance":41.58124577258358},{"slug":"peat","name":"Peat","hex":"#3B2F2F","distance":42.44997055358225}]

HEX meaning and use

About #403F08

#403F08 is classified as a warm yellow value with dark visual character. #403F08 is visually closest to Espresso, a named orange color with HEX #4B3621.

The RGB channels are 64, 63, and 8, with red carrying the strongest channel weight. In HSL, the hue is 59deg with 78% saturation and 14% 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 dark theme accents. Its luminance is 0.0466, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 28.76, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text1.93:1AA Fail

White text10.87:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #403F08 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000001.93:1 · Fail

White text#FFFFFF10.87:1 · AAA

Accessible Alternatives

Black#FFFFFF text · best 21:1#000000

#080940#FFFFFF text · best 18.68:1#080940

#402308#FFFFFF text · best 14.36:1#402308

Peat#FFFFFF text · best 12.85:1#3B2F2F

#383710#FFFFFF text · best 12.2:1#383710

Generated Palette

#403F08#403F08

#080940#080940

#402308#402308

#254008#254008

#918F12#918F12

Black#000000

Color Harmonies

#080940#080940

#402308#402308

#254008#254008

#08403F#08403F

#3F0840#3F0840

Variants

#918F12#918F12

Black#000000

#474600#474600

#383710#383710

#A2A025#A2A025

#706E00#706E00

Nearest Named Colors

Espresso#4B3621

Terre Verte#385E0F

Pine Bark#4A3728

Moss Deep#4A5D23

Peat#3B2F2F

#403F08

CSS

Machine-Readable HEX Data (JSON)

About #403F08

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides