HEX atlas value

#B9CA21

#B9CA21 is a warm yellow HEX color close to Peridot. According to Colors Encyclopedia, it converts to RGB 185, 202, 33, HSL 66, 72%, 46%, has luminance 0.5267, and belongs to the vibrant group.

yellow warm vibrant

#B9CA21 Sample readable text

HEX #B9CA21

RGB rgb(185, 202, 33)

HSL hsl(66 72% 46%)

CMYK cmyk(8, 0, 84, 21)

Luminance 0.5267

Contrast Black 11.53:1White 1.82:1

CSS

--color-b9ca21: #B9CA21;
.background-b9ca21 { background-color: #B9CA21; }
.text-b9ca21 { color: #B9CA21; }

Luminance0.5267

Black text11.53:1AA Pass

White text1.82:1AA 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":"#B9CA21","rgb":[185,202,33],"hsl":[66,72,46],"cmyk":[8,0,84,21],"luminance":0.5267,"contrast":{"black":11.53,"white":1.82}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":11.53,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":1.82,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#D8E561","hex":"#D8E561","family":"yellow","bestTextColor":"#000000","contrastBlack":15.3,"contrastWhite":1.37,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#CEE407","hex":"#CEE407","family":"yellow","bestTextColor":"#000000","contrastBlack":14.72,"contrastWhite":1.43,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"Pear","hex":"#D1E231","family":"yellow","bestTextColor":"#000000","contrastBlack":14.63,"contrastWhite":1.44,"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"]}]

AI context

{"semanticGroups":["warm yellow","vibrant","vibrant yellow","Peridot 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/b9ca21.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/peridot.json","https://www.colorsencyclopedia.com/api/colors/acid-green.json","https://www.colorsencyclopedia.com/api/colors/yellow-green.json"]}

Harmonies

{"complementary":"#3221CA","analogous":["#CA8621","#64CA21"],"triadic":["#21B9CA","#CA21B9"],"tetradic":["#21CA86","#3221CA","#CA2164"],"splitComplementary":["#2164CA","#8621CA"],"monochromatic":["#D8E561","#B9CA21","#717B14"]}

Variants

{"light":"#D8E561","dark":"#717B14","saturated":"#CEE407","desaturated":"#A4B03B","pastel":"#D7DF8B","neon":"#E8FF14"}

Nearest named colors

[{"slug":"peridot","name":"Peridot","hex":"#B4C424","distance":8.366600265340756},{"slug":"acid-green","name":"Acid Green","hex":"#B0BF1A","distance":15.84297951775486},{"slug":"yellow-green","name":"Yellow Green","hex":"#9ACD32","distance":35.482389998420345},{"slug":"pear","name":"Pear","hex":"#D1E231","distance":37.52332607858744},{"slug":"old-gold","name":"Old Gold","hex":"#CFB53B","distance":40.01249804748511}]

HEX meaning and use

About #B9CA21

#B9CA21 is classified as a warm yellow value with vibrant visual character. #B9CA21 is visually closest to Peridot, a named yellow color with HEX #B4C424.

The RGB channels are 185, 202, and 33, with green carrying the strongest channel weight. In HSL, the hue is 66deg with 72% saturation and 46% 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 0.5267, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 8.37, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text11.53:1AA Pass

White text1.82:1AA Fail

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

AAA text options: #000000, #1A1A1A.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #B9CA21 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#00000011.53:1 · AAA

White text#FFFFFF1.82:1 · Fail

Accessible Alternatives

#D8E561#000000 text · best 15.3:1#D8E561

#CEE407#000000 text · best 14.72:1#CEE407

Pear#000000 text · best 14.63:1#D1E231

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

Peridot#000000 text · best 10.86:1#B4C424

Generated Palette

#B9CA21#B9CA21

#3221CA#3221CA

#CA8621#CA8621

#64CA21#64CA21

#D8E561#D8E561

#717B14#717B14

Color Harmonies

#3221CA#3221CA

#CA8621#CA8621

#64CA21#64CA21

#21B9CA#21B9CA

#CA21B9#CA21B9

Variants

#D8E561#D8E561

#717B14#717B14

#CEE407#CEE407

#A4B03B#A4B03B

#D7DF8B#D7DF8B

#E8FF14#E8FF14

Nearest Named Colors

Peridot#B4C424

Acid Green#B0BF1A

Yellow Green#9ACD32

Pear#D1E231

Old Gold#CFB53B

#B9CA21

CSS

Machine-Readable HEX Data (JSON)

About #B9CA21

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides