HEX atlas value

#C5C511

#C5C511 is a warm yellow HEX color close to Acid Green. According to Colors Encyclopedia, it converts to RGB 197, 197, 17, HSL 60, 84%, 42%, has luminance 0.5184, and belongs to the vibrant group.

yellow warm vibrant

#C5C511 Sample readable text

HEX #C5C511

RGB rgb(197, 197, 17)

HSL hsl(60 84% 42%)

CMYK cmyk(0, 0, 91, 23)

Luminance 0.5184

Contrast Black 11.37:1White 1.85:1

CSS

--color-c5c511: #C5C511;
.background-c5c511 { background-color: #C5C511; }
.text-c5c511 { color: #C5C511; }

Luminance0.5184

Black text11.37:1AA Pass

White text1.85:1AA 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":"#C5C511","rgb":[197,197,17],"hsl":[60,84,42],"cmyk":[0,0,91,23],"luminance":0.5184,"contrast":{"black":11.37,"white":1.85}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":11.37,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":1.85,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#EFEF43","hex":"#EFEF43","family":"yellow","bestTextColor":"#000000","contrastBlack":17.1,"contrastWhite":1.23,"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":"#1111C5","hex":"#1111C5","family":"blue","bestTextColor":"#FFFFFF","contrastBlack":1.91,"contrastWhite":10.99,"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/c5c511.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/citrine.json"]}

Harmonies

{"complementary":"#1111C5","analogous":["#C56B11","#6BC511"],"triadic":["#11C5C5","#C511C5"],"tetradic":["#11C56B","#1111C5","#C5116B"],"splitComplementary":["#116BC5","#6B11C5"],"monochromatic":["#EFEF43","#C5C511","#71710A"]}

Variants

{"light":"#EFEF43","dark":"#71710A","saturated":"#D6D600","desaturated":"#AEAE29","pastel":"#E5E571","neon":"#FFFF00"}

Nearest named colors

[{"slug":"acid-green","name":"Acid Green","hex":"#B0BF1A","distance":23.62202362203543},{"slug":"peridot","name":"Peridot","hex":"#B4C424","distance":25.514701644346147},{"slug":"citrine","name":"Citrine","hex":"#E4D00A","distance":33.63034344160047},{"slug":"mustard-yellow","name":"Mustard Yellow","hex":"#E1AD01","distance":40.19950248448356},{"slug":"goldenrod","name":"Goldenrod","hex":"#DAA520","distance":41.10960958218893}]

HEX meaning and use

About #C5C511

#C5C511 is classified as a warm yellow value with vibrant visual character. #C5C511 is visually closest to Acid Green, a named yellow color with HEX #B0BF1A.

The RGB channels are 197, 197, and 17, with red carrying the strongest channel weight. In HSL, the hue is 60deg 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 0.5184, 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 text11.37:1AA Pass

White text1.85:1AA Fail

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

AAA text options: #000000, #1A1A1A.

Accessibility-Safe Pairings and Alternatives

Use these pairings when #C5C511 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#00000011.37:1 · AAA

White text#FFFFFF1.85:1 · Fail

Accessible Alternatives

#EFEF43#000000 text · best 17.1:1#EFEF43

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

Citrine#000000 text · best 13.33:1#E4D00A

#1111C5#FFFFFF text · best 10.99:1#1111C5

Peridot#000000 text · best 10.86:1#B4C424

Generated Palette

#C5C511#C5C511

#1111C5#1111C5

#C56B11#C56B11

#6BC511#6BC511

#EFEF43#EFEF43

#71710A#71710A

Color Harmonies

#1111C5#1111C5

#C56B11#C56B11

#6BC511#6BC511

#11C5C5#11C5C5

#C511C5#C511C5

Variants

#EFEF43#EFEF43

#71710A#71710A

#D6D600#D6D600

#AEAE29#AEAE29

#E5E571#E5E571

Yellow#FFFF00

Nearest Named Colors

Acid Green#B0BF1A

Peridot#B4C424

Citrine#E4D00A

Mustard Yellow#E1AD01

Goldenrod#DAA520

#C5C511

CSS

Machine-Readable HEX Data (JSON)

About #C5C511

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides