HEX atlas value

#C5B911

#C5B911 is a warm yellow HEX color close to Acid Green. According to Colors Encyclopedia, it converts to RGB 197, 185, 17, HSL 56, 84%, 42%, has luminance 0.4661, and belongs to the vibrant group.

yellow warm vibrant

#C5B911 Sample readable text

HEX #C5B911

RGB rgb(197, 185, 17)

HSL hsl(56 84% 42%)

CMYK cmyk(0, 6, 91, 23)

Luminance 0.4661

Contrast Black 10.32:1White 2.03:1

CSS

--color-c5b911: #C5B911;
.background-c5b911 { background-color: #C5B911; }
.text-c5b911 { color: #C5B911; }

Luminance0.4661

Black text10.32:1AA 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":"#C5B911","rgb":[197,185,17],"hsl":[56,84,42],"cmyk":[0,6,91,23],"luminance":0.4661,"contrast":{"black":10.32,"white":2.03}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":10.32,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":2.03,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#EFE343","hex":"#EFE343","family":"yellow","bestTextColor":"#000000","contrastBlack":15.74,"contrastWhite":1.33,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"Citrine","hex":"#E4D00A","family":"yellow","bestTextColor":"#000000","contrastBlack":13.33,"contrastWhite":1.58,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A"]},{"name":"#D6C800","hex":"#D6C800","family":"yellow","bestTextColor":"#000000","contrastBlack":12.12,"contrastWhite":1.73,"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":"#111DC5","hex":"#111DC5","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":2.01,"contrastWhite":10.47,"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/c5b911.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":"#111DC5","analogous":["#C55F11","#77C511"],"triadic":["#11C5B9","#B911C5"],"tetradic":["#11C55F","#111DC5","#C51177"],"splitComplementary":["#1177C5","#5F11C5"],"monochromatic":["#EFE343","#C5B911","#716A0A"]}

Variants

{"light":"#EFE343","dark":"#716A0A","saturated":"#D6C800","desaturated":"#AEA529","pastel":"#E5DD71","neon":"#FFEE00"}

Nearest named colors

[{"slug":"acid-green","name":"Acid Green","hex":"#B0BF1A","distance":23.62202362203543},{"slug":"peridot","name":"Peridot","hex":"#B4C424","distance":27.76688675382964},{"slug":"goldenrod","name":"Goldenrod","hex":"#DAA520","distance":32.64965543462902},{"slug":"mustard-yellow","name":"Mustard Yellow","hex":"#E1AD01","distance":34.40930106817051},{"slug":"citrine","name":"Citrine","hex":"#E4D00A","distance":39.230090491866065}]

HEX meaning and use

About #C5B911

#C5B911 is classified as a warm yellow value with vibrant visual character. #C5B911 is visually closest to Acid Green, a named yellow color with HEX #B0BF1A.

The RGB channels are 197, 185, and 17, with red carrying the strongest channel weight. In HSL, the hue is 56deg with 84% 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 0.4661, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 23.62, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text10.32:1AA 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 #C5B911 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#00000010.32:1 · AAA

White text#FFFFFF2.03:1 · Fail

Accessible Alternatives

#EFE343#000000 text · best 15.74:1#EFE343

Citrine#000000 text · best 13.33:1#E4D00A

#D6C800#000000 text · best 12.12:1#D6C800

Peridot#000000 text · best 10.86:1#B4C424

#111DC5#FFFFFF text · best 10.47:1#111DC5

Generated Palette

#C5B911#C5B911

#111DC5#111DC5

#C55F11#C55F11

#77C511#77C511

#EFE343#EFE343

#716A0A#716A0A

Color Harmonies

#111DC5#111DC5

#C55F11#C55F11

#77C511#77C511

#11C5B9#11C5B9

#B911C5#B911C5

Variants

#EFE343#EFE343

#716A0A#716A0A

#D6C800#D6C800

#AEA529#AEA529

#E5DD71#E5DD71

#FFEE00#FFEE00

Nearest Named Colors

Acid Green#B0BF1A

Peridot#B4C424

Goldenrod#DAA520

Mustard Yellow#E1AD01

Citrine#E4D00A

#C5B911

CSS

Machine-Readable HEX Data (JSON)

About #C5B911

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides