Colors Encyclopedia

HEX atlas value

#400D08

#400D08 is a warm red HEX color close to Oxblood. According to Colors Encyclopedia, it converts to RGB 64, 13, 8, HSL 5, 78%, 14%, has luminance 0.014, and belongs to the dark group.

redwarmdark
#400D08 Sample readable text
HEX #400D08
RGB rgb(64, 13, 8)
HSL hsl(5 78% 14%)
CMYK cmyk(0, 80, 88, 75)
Luminance 0.014
Contrast Black 1.28:1White 16.41:1

CSS

--color-400d08: #400D08;
.background-400d08 { background-color: #400D08; }
.text-400d08 { color: #400D08; }

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
Luminance0.014
Black text1.28:1AA Fail
White text16.41:1AA 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":"#400D08","rgb":[64,13,8],"hsl":[5,78,14],"cmyk":[0,80,88,75],"luminance":0.014,"contrast":{"black":1.28,"white":16.41}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":["#FFFFFF","#F5F5F5"]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":1.28,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":16.41,"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":"Matte Black","hex":"#1A1A1A","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.21,"contrastWhite":17.41,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Carbon Fiber","hex":"#1C1C1C","family":"gray","bestTextColor":"#FFFFFF","contrastBlack":1.23,"contrastWhite":17.05,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#381310","hex":"#381310","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.27,"contrastWhite":16.56,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#40081F","hex":"#40081F","family":"pink","bestTextColor":"#FFFFFF","contrastBlack":1.27,"contrastWhite":16.51,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]
AI context
{"semanticGroups":["warm red","dark","dark red","Oxblood adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","dark theme accents","high-attention visual states"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/400d08.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/oxblood.json","https://www.colorsencyclopedia.com/api/colors/carbon-fiber.json","https://www.colorsencyclopedia.com/api/colors/matte-black.json"]}
Harmonies
{"complementary":"#083B40","analogous":["#40081F","#402808"],"triadic":["#08400C","#0C0840"],"tetradic":["#1F4008","#083B40","#280840"],"splitComplementary":["#084028","#081F40"],"monochromatic":["#911D12","#400D08","#000000"]}
Variants
{"light":"#911D12","dark":"#000000","saturated":"#470600","desaturated":"#381310","pastel":"#A22F25","neon":"#700900"}
Nearest named colors
[{"slug":"oxblood","name":"Oxblood","hex":"#4A0000","distance":18.24828759089466},{"slug":"carbon-fiber","name":"Carbon Fiber","hex":"#1C1C1C","distance":43.829214001622255},{"slug":"matte-black","name":"Matte Black","hex":"#1A1A1A","distance":44.01136216933077},{"slug":"raisin","name":"Raisin","hex":"#242124","distance":44.36214602563767},{"slug":"rubber","name":"Rubber","hex":"#2A2725","distance":44.73253849269008}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #400D08

#400D08 is classified as a warm red value with dark visual character. #400D08 is visually closest to Oxblood, a named red color with HEX #4A0000.

The RGB channels are 64, 13, and 8, with red carrying the strongest channel weight. In HSL, the hue is 5deg 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 0.014, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 18.25, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text1.28:1AA Fail
White text16.41:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: #FFFFFF, #F5F5F5.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #400D08 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000001.28:1 · Fail
White text#FFFFFF16.41:1 · AAA

Accessible Alternatives

Black#FFFFFF text · best 21:1#000000
Matte Black#FFFFFF text · best 17.41:1#1A1A1A
Carbon Fiber#FFFFFF text · best 17.05:1#1C1C1C
#381310#FFFFFF text · best 16.56:1#381310
#40081F#FFFFFF text · best 16.51:1#40081F

Generated Palette

#400D08#400D08
#083B40#083B40
#40081F#40081F
#402808#402808
#911D12#911D12
Black#000000

Color Harmonies

#083B40#083B40
#40081F#40081F
#402808#402808
#08400C#08400C
#0C0840#0C0840

Variants

#911D12#911D12
Black#000000
#470600#470600
#381310#381310
#A22F25#A22F25
#700900#700900

Nearest Named Colors

Oxblood#4A0000
Carbon Fiber#1C1C1C
Matte Black#1A1A1A
Raisin#242124
Rubber#2A2725

Related HEX Guides

Oxblood colorOpen the nearest named color reference for #4A0000.Carbon Fiber colorOpen the nearest named color reference for #1C1C1C.Matte Black colorOpen the nearest named color reference for #1A1A1A.Red color familyBrowse named red colors related to this HEX value.Warm colorsExplore colors with similar temperature behavior.Dark colorsFind colors in the dark 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.#400D08 APIOpen the machine-readable JSON record for this HEX value.