HEX atlas value

#B81E1E

#B81E1E is a warm red HEX color close to Firebrick. According to Colors Encyclopedia, it converts to RGB 184, 30, 30, HSL 0, 72%, 42%, has luminance 0.1121, and belongs to the vibrant group.

red warm vibrant

#B81E1E Sample readable text

HEX #B81E1E

RGB rgb(184, 30, 30)

HSL hsl(0 72% 42%)

CMYK cmyk(0, 84, 84, 28)

Luminance 0.1121

Contrast Black 3.24:1White 6.48:1

CSS

--color-b81e1e: #B81E1E;
.background-b81e1e { background-color: #B81E1E; }
.text-b81e1e { color: #B81E1E; }

Luminance0.1121

Black text3.24:1AA Fail

White text6.48:1AA 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":"#B81E1E","rgb":[184,30,30],"hsl":[0,72,42],"cmyk":[0,84,84,28],"luminance":0.1121,"contrast":{"black":3.24,"white":6.48}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":3.24,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":6.48,"wcagAA":true,"wcagAAA":false}]

Accessible alternatives

[{"name":"#691111","hex":"#691111","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.69,"contrastWhite":12.44,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#1EB8B8","hex":"#1EB8B8","family":"cyan","bestTextColor":"#000000","contrastBlack":8.6,"contrastWhite":2.44,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Anodized Red","hex":"#B00020","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.87,"contrastWhite":7.33,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"Brown","hex":"#A52A2A","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.96,"contrastWhite":7.09,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]},{"name":"Tool Red","hex":"#B11226","family":"red","bestTextColor":"#FFFFFF","contrastBlack":2.98,"contrastWhite":7.04,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF"]}]

AI context

{"semanticGroups":["warm red","vibrant","vibrant red","Firebrick adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-energy accents","high-attention visual states"],"contrastSafeWith":["#FFFFFF","#F5F5F5"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/b81e1e.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/firebrick.json","https://www.colorsencyclopedia.com/api/colors/tool-red.json","https://www.colorsencyclopedia.com/api/colors/brown.json"]}

Harmonies

{"complementary":"#1EB8B8","analogous":["#B81E6B","#B86B1E"],"triadic":["#1EB81E","#1E1EB8"],"tetradic":["#6BB81E","#1EB8B8","#6B1EB8"],"splitComplementary":["#1EB86B","#1E6BB8"],"monochromatic":["#E25050","#B81E1E","#691111"]}

Variants

{"light":"#E25050","dark":"#691111","saturated":"#D00606","desaturated":"#A13636","pastel":"#DB7B7B","neon":"#FF0000"}

Nearest named colors

[{"slug":"firebrick","name":"Firebrick","hex":"#B22222","distance":8.246211251235321},{"slug":"tool-red","name":"Tool Red","hex":"#B11226","distance":16.0312195418814},{"slug":"brown","name":"Brown","hex":"#A52A2A","distance":25.475478405713993},{"slug":"venetian-red","name":"Venetian Red","hex":"#C80815","distance":28.653097563788805},{"slug":"anodized-red","name":"Anodized Red","hex":"#B00020","distance":31.11269837220809}]

HEX meaning and use

About #B81E1E

#B81E1E is classified as a warm red value with vibrant visual character. #B81E1E is visually closest to Firebrick, a named red color with HEX #B22222.

The RGB channels are 184, 30, and 30, with red carrying the strongest channel weight. In HSL, the hue is 0deg with 72% saturation and 42% lightness, so this page treats it as a high-saturation, mid-lightness 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 high-energy accents. Its luminance is 0.1121, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 8.25, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.24:1AA Fail

White text6.48:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #B81E1E needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.24:1 · Fail

White text#FFFFFF6.48:1 · AA

Accessible Alternatives

#691111#FFFFFF text · best 12.44:1#691111

#1EB8B8#000000 text · best 8.6:1#1EB8B8

Anodized Red#FFFFFF text · best 7.33:1#B00020

Brown#FFFFFF text · best 7.09:1#A52A2A

Tool Red#FFFFFF text · best 7.04:1#B11226

Generated Palette

#B81E1E#B81E1E

#1EB8B8#1EB8B8

#B81E6B#B81E6B

#B86B1E#B86B1E

#E25050#E25050

#691111#691111

Color Harmonies

#1EB8B8#1EB8B8

#B81E6B#B81E6B

#B86B1E#B86B1E

#1EB81E#1EB81E

#1E1EB8#1E1EB8

Variants

#E25050#E25050

#691111#691111

#D00606#D00606

#A13636#A13636

#DB7B7B#DB7B7B

Red#FF0000

Nearest Named Colors

Firebrick#B22222

Tool Red#B11226

Brown#A52A2A

Venetian Red#C80815

Anodized Red#B00020

#B81E1E

CSS

Machine-Readable HEX Data (JSON)

About #B81E1E

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides