Colors Encyclopedia

HEX atlas value

#BF3F18

#BF3F18 is a warm red HEX color close to Rust. According to Colors Encyclopedia, it converts to RGB 191, 63, 24, HSL 14, 78%, 42%, has luminance 0.147, and belongs to the vibrant group.

redwarmvibrant
#BF3F18 Sample readable text
HEX #BF3F18
RGB rgb(191, 63, 24)
HSL hsl(14 78% 42%)
CMYK cmyk(0, 67, 87, 25)
Luminance 0.147
Contrast Black 3.94:1White 5.33:1

CSS

--color-bf3f18: #BF3F18;
.background-bf3f18 { background-color: #BF3F18; }
.text-bf3f18 { color: #BF3F18; }

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
Luminance0.147
Black text3.94:1AA Fail
White text5.33:1AA 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":"#BF3F18","rgb":[191,63,24],"hsl":[14,78,42],"cmyk":[0,67,87,25],"luminance":0.147,"contrast":{"black":3.94,"white":5.33}}
WCAG
{"AA":["#FFFFFF","#F5F5F5"],"AAA":[]}
Safe pairings
[{"name":"Black text","hex":"#000000","contrast":3.94,"wcagAA":false,"wcagAAA":false},{"name":"White text","hex":"#FFFFFF","contrast":5.33,"wcagAA":true,"wcagAAA":false}]
Accessible alternatives
[{"name":"#6D240D","hex":"#6D240D","family":"red","bestTextColor":"#FFFFFF","contrastBlack":1.91,"contrastWhite":11.01,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"#BF9218","hex":"#BF9218","family":"orange","bestTextColor":"#000000","contrastBlack":7.34,"contrastWhite":2.86,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":["#000000"]},{"name":"#E96F49","hex":"#E96F49","family":"red","bestTextColor":"#000000","contrastBlack":6.83,"contrastWhite":3.07,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]},{"name":"Firebrick","hex":"#B22222","family":"red","bestTextColor":"#FFFFFF","contrastBlack":3.14,"contrastWhite":6.68,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":[]},{"name":"#1898BF","hex":"#1898BF","family":"cyan","bestTextColor":"#000000","contrastBlack":6.28,"contrastWhite":3.34,"wcagAA":["#000000","#1A1A1A"],"wcagAAA":[]}]
AI context
{"semanticGroups":["warm red","vibrant","vibrant red","Rust 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/bf3f18.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/rust.json","https://www.colorsencyclopedia.com/api/colors/mahogany.json","https://www.colorsencyclopedia.com/api/colors/persian-red.json"]}
Harmonies
{"complementary":"#1898BF","analogous":["#BF1844","#BF9218"],"triadic":["#18BF3F","#3F18BF"],"tetradic":["#44BF18","#1898BF","#9218BF"],"splitComplementary":["#18BF92","#1844BF"],"monochromatic":["#E96F49","#BF3F18","#6D240D"]}
Variants
{"light":"#E96F49","dark":"#6D240D","saturated":"#D63200","desaturated":"#A74B2F","pastel":"#E08F76","neon":"#FF3C00"}
Nearest named colors
[{"slug":"rust","name":"Rust","hex":"#B7410E","distance":12.96148139681572},{"slug":"mahogany","name":"Mahogany","hex":"#C04000","distance":24.041630560342615},{"slug":"persian-red","name":"Persian Red","hex":"#CC3333","distance":32.28002478313795},{"slug":"firebrick","name":"Firebrick","hex":"#B22222","distance":33.31666249791537},{"slug":"burnt-orange","name":"Burnt Orange","hex":"#CC5500","distance":35.05709628591621}]
Dataset manifest Version 1.0.0 Build hash published in manifest Canonical page

HEX meaning and use

About #BF3F18

#BF3F18 is classified as a warm red value with vibrant visual character. #BF3F18 is visually closest to Rust, a named orange color with HEX #B7410E.

The RGB channels are 191, 63, and 24, with red carrying the strongest channel weight. In HSL, the hue is 14deg with 78% 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 0.147, white text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 12.96, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text3.94:1AA Fail
White text5.33:1AA Pass

AA text options: #FFFFFF, #F5F5F5.

AAA text options: none in seed set.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #BF3F18 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#0000003.94:1 · Fail
White text#FFFFFF5.33:1 · AA

Accessible Alternatives

#6D240D#FFFFFF text · best 11.01:1#6D240D
#BF9218#000000 text · best 7.34:1#BF9218
#E96F49#000000 text · best 6.83:1#E96F49
Firebrick#FFFFFF text · best 6.68:1#B22222
#1898BF#000000 text · best 6.28:1#1898BF

Generated Palette

#BF3F18#BF3F18
#1898BF#1898BF
#BF1844#BF1844
#BF9218#BF9218
#E96F49#E96F49
#6D240D#6D240D

Color Harmonies

#1898BF#1898BF
#BF1844#BF1844
#BF9218#BF9218
#18BF3F#18BF3F
#3F18BF#3F18BF

Variants

#E96F49#E96F49
#6D240D#6D240D
#D63200#D63200
#A74B2F#A74B2F
#E08F76#E08F76
#FF3C00#FF3C00

Nearest Named Colors

Rust#B7410E
Mahogany#C04000
Persian Red#CC3333
Firebrick#B22222
Burnt Orange#CC5500

Related HEX Guides

Rust colorOpen the nearest named color reference for #B7410E.Mahogany colorOpen the nearest named color reference for #C04000.Persian Red colorOpen the nearest named color reference for #CC3333.Red color familyBrowse named red colors related to this HEX value.Warm colorsExplore colors with similar temperature behavior.Vibrant colorsFind colors in the vibrant 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.#BF3F18 APIOpen the machine-readable JSON record for this HEX value.