HEX atlas value

#BFBF18

#BFBF18 is a warm yellow HEX color close to Acid Green. According to Colors Encyclopedia, it converts to RGB 191, 191, 24, HSL 60, 78%, 42%, has luminance 0.484, and belongs to the vibrant group.

yellow warm vibrant

#BFBF18 Sample readable text

HEX #BFBF18

RGB rgb(191, 191, 24)

HSL hsl(60 78% 42%)

CMYK cmyk(0, 0, 87, 25)

Luminance 0.484

Contrast Black 10.68:1White 1.97:1

CSS

--color-bfbf18: #BFBF18;
.background-bfbf18 { background-color: #BFBF18; }
.text-bfbf18 { color: #BFBF18; }

Luminance0.484

Black text10.68:1AA Pass

White text1.97:1AA Fail

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":"#BFBF18","rgb":[191,191,24],"hsl":[60,78,42],"cmyk":[0,0,87,25],"luminance":0.484,"contrast":{"black":10.68,"white":1.97}}

WCAG

{"AA":["#000000","#1A1A1A","#36454F"],"AAA":["#000000","#1A1A1A"]}

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":10.68,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":1.97,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#E9E949","hex":"#E9E949","family":"yellow","bestTextColor":"#000000","contrastBlack":16.22,"contrastWhite":1.3,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#D6D600","hex":"#D6D600","family":"yellow","bestTextColor":"#000000","contrastBlack":13.48,"contrastWhite":1.56,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Citrine","hex":"#E4D00A","family":"yellow","bestTextColor":"#000000","contrastBlack":13.33,"contrastWhite":1.58,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#1818BF","hex":"#1818BF","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.92,"contrastWhite":10.93,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]},{"name":"Peridot","hex":"#B4C424","family":"yellow","bestTextColor":"#000000","contrastBlack":10.86,"contrastWhite":1.93,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]}]

AI context

{"semanticGroups":["warm yellow","vibrant","vibrant yellow","Acid Green adjacent"],"useCases":["color conversion","WCAG contrast checks","CSS color tokens","high-energy accents","highlight and warning systems"],"contrastSafeWith":["#000000","#1A1A1A","#36454F"],"relatedEndpoints":["https://www.colorsencyclopedia.com/api/hex/bfbf18.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/acid-green.json","https://www.colorsencyclopedia.com/api/colors/peridot.json","https://www.colorsencyclopedia.com/api/colors/goldenrod.json"]}

Harmonies

{"complementary":"#1818BF","analogous":["#BF6B18","#6BBF18"],"triadic":["#18BFBF","#BF18BF"],"tetradic":["#18BF6B","#1818BF","#BF186B"],"splitComplementary":["#186BBF","#6B18BF"],"monochromatic":["#E9E949","#BFBF18","#6D6D0D"]}

Variants

{"light":"#E9E949","dark":"#6D6D0D","saturated":"#D6D600","desaturated":"#A7A72F","pastel":"#E0E076","neon":"#FFFF00"}

Nearest named colors

[{"slug":"acid-green","name":"Acid Green","hex":"#B0BF1A","distance":15.132745950421556},{"slug":"peridot","name":"Peridot","hex":"#B4C424","distance":17.029386365926403},{"slug":"goldenrod","name":"Goldenrod","hex":"#DAA520","distance":38.3275357934736},{"slug":"old-gold","name":"Old Gold","hex":"#CFB53B","distance":39.761790704142086},{"slug":"citrine","name":"Citrine","hex":"#E4D00A","distance":43.05810028322197}]

HEX meaning and use

About #BFBF18

#BFBF18 is classified as a warm yellow value with vibrant visual character. #BFBF18 is visually closest to Acid Green, a named yellow color with HEX #B0BF1A.

The RGB channels are 191, 191, and 24, with red carrying the strongest channel weight. In HSL, the hue is 60deg 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 0.484, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 15.13, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text10.68:1AA Pass

White text1.97:1AA Fail

AA text options: #000000, #1A1A1A, #36454F.

AAA text options: #000000, #1A1A1A.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #BFBF18 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#00000010.68:1 · AAA

White text#FFFFFF1.97:1 · Fail

Accessible Alternatives

#E9E949#000000 text · best 16.22:1#E9E949

#D6D600#000000 text · best 13.48:1#D6D600

Citrine#000000 text · best 13.33:1#E4D00A

#1818BF#FFFFFF text · best 10.93:1#1818BF

Peridot#000000 text · best 10.86:1#B4C424

Generated Palette

#BFBF18#BFBF18

#1818BF#1818BF

#BF6B18#BF6B18

#6BBF18#6BBF18

#E9E949#E9E949

#6D6D0D#6D6D0D

Color Harmonies

#1818BF#1818BF

#BF6B18#BF6B18

#6BBF18#6BBF18

#18BFBF#18BFBF

#BF18BF#BF18BF

Variants

#E9E949#E9E949

#6D6D0D#6D6D0D

#D6D600#D6D600

#A7A72F#A7A72F

#E0E076#E0E076

Yellow#FFFF00

Nearest Named Colors

Acid Green#B0BF1A

Peridot#B4C424

Goldenrod#DAA520

Old Gold#CFB53B

Citrine#E4D00A

#BFBF18

CSS

Machine-Readable HEX Data (JSON)

About #BFBF18

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides