HEX atlas value

#B1BF18

#B1BF18 is a warm yellow HEX color close to Acid Green. According to Colors Encyclopedia, it converts to RGB 177, 191, 24, HSL 65, 78%, 42%, has luminance 0.4667, and belongs to the vibrant group.

yellow warm vibrant

#B1BF18 Sample readable text

HEX #B1BF18

RGB rgb(177, 191, 24)

HSL hsl(65 78% 42%)

CMYK cmyk(7, 0, 87, 25)

Luminance 0.4667

Contrast Black 10.33:1White 2.03:1

CSS

--color-b1bf18: #B1BF18;
.background-b1bf18 { background-color: #B1BF18; }
.text-b1bf18 { color: #B1BF18; }

Luminance0.4667

Black text10.33:1AA Pass

White text2.03:1AA 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":"#B1BF18","rgb":[177,191,24],"hsl":[65,78,42],"cmyk":[7,0,87,25],"luminance":0.4667,"contrast":{"black":10.33,"white":2.03}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":10.33,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":2.03,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#DBE949","hex":"#DBE949","family":"yellow","bestTextColor":"#000000","contrastBlack":15.76,"contrastWhite":1.33,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#C4D600","hex":"#C4D600","family":"yellow","bestTextColor":"#000000","contrastBlack":12.97,"contrastWhite":1.62,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Yellow Green","hex":"#9ACD32","family":"green","bestTextColor":"#000000","contrastBlack":11.15,"contrastWhite":1.88,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Peridot","hex":"#B4C424","family":"yellow","bestTextColor":"#000000","contrastBlack":10.86,"contrastWhite":1.93,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#2518BF","hex":"#2518BF","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.96,"contrastWhite":10.7,"wcagAA":["#FFFFFF","#F5F5F5"],"wcagAAA":["#FFFFFF","#F5F5F5"]}]

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/b1bf18.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/yellow-green.json"]}

Harmonies

{"complementary":"#2518BF","analogous":["#BF7918","#5DBF18"],"triadic":["#18B1BF","#BF18B1"],"tetradic":["#18BF79","#2518BF","#BF185D"],"splitComplementary":["#185DBF","#7918BF"],"monochromatic":["#DBE949","#B1BF18","#656D0D"]}

Variants

{"light":"#DBE949","dark":"#656D0D","saturated":"#C4D600","desaturated":"#9DA72F","pastel":"#D7E076","neon":"#EAFF00"}

Nearest named colors

[{"slug":"acid-green","name":"Acid Green","hex":"#B0BF1A","distance":2.23606797749979},{"slug":"peridot","name":"Peridot","hex":"#B4C424","distance":13.341664064126334},{"slug":"yellow-green","name":"Yellow Green","hex":"#9ACD32","distance":37.429934544425805},{"slug":"old-gold","name":"Old Gold","hex":"#CFB53B","distance":47.16990566028302},{"slug":"brass","name":"Brass","hex":"#B5A642","distance":49.040799340956916}]

HEX meaning and use

About #B1BF18

#B1BF18 is classified as a warm yellow value with vibrant visual character. #B1BF18 is visually closest to Acid Green, a named yellow color with HEX #B0BF1A.

The RGB channels are 177, 191, and 24, with green carrying the strongest channel weight. In HSL, the hue is 65deg 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 0.4667, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 2.24, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text10.33:1AA Pass

White text2.03:1AA Fail

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

AAA text options: #000000, #1A1A1A.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #B1BF18 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#00000010.33:1 · AAA

White text#FFFFFF2.03:1 · Fail

Accessible Alternatives

#DBE949#000000 text · best 15.76:1#DBE949

#C4D600#000000 text · best 12.97:1#C4D600

Yellow Green#000000 text · best 11.15:1#9ACD32

Peridot#000000 text · best 10.86:1#B4C424

#2518BF#FFFFFF text · best 10.7:1#2518BF

Generated Palette

#B1BF18#B1BF18

#2518BF#2518BF

#BF7918#BF7918

#5DBF18#5DBF18

#DBE949#DBE949

#656D0D#656D0D

Color Harmonies

#2518BF#2518BF

#BF7918#BF7918

#5DBF18#5DBF18

#18B1BF#18B1BF

#BF18B1#BF18B1

Variants

#DBE949#DBE949

#656D0D#656D0D

#C4D600#C4D600

#9DA72F#9DA72F

#D7E076#D7E076

#EAFF00#EAFF00

Nearest Named Colors

Acid Green#B0BF1A

Peridot#B4C424

Yellow Green#9ACD32

Old Gold#CFB53B

Brass#B5A642

#B1BF18

CSS

Machine-Readable HEX Data (JSON)

About #B1BF18

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides