HEX atlas value

#FFFF31

#FFFF31 is a warm yellow HEX color close to Daffodil. According to Colors Encyclopedia, it converts to RGB 255, 255, 49, HSL 60, 100%, 60%, has luminance 0.93, and belongs to the vibrant group.

yellow warm vibrant

#FFFF31 Sample readable text

HEX #FFFF31

RGB rgb(255, 255, 49)

HSL hsl(60 100% 60%)

CMYK cmyk(0, 0, 81, 0)

Luminance 0.93

Contrast Black 19.6:1White 1.07:1

CSS

--color-ffff31: #FFFF31;
.background-ffff31 { background-color: #FFFF31; }
.text-ffff31 { color: #FFFF31; }

Luminance0.93

Black text19.6:1AA Pass

White text1.07:1AA 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":"#FFFF31","rgb":[255,255,49],"hsl":[60,100,60],"cmyk":[0,0,81,0],"luminance":0.93,"contrast":{"black":19.6,"white":1.07}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":19.6,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":1.07,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"#FFFF8F","hex":"#FFFF8F","family":"yellow","bestTextColor":"#000000","contrastBlack":19.95,"contrastWhite":1.05,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#FFFF33","hex":"#FFFF33","family":"yellow","bestTextColor":"#000000","contrastBlack":19.6,"contrastWhite":1.07,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"Yellow","hex":"#FFFF00","family":"yellow","bestTextColor":"#000000","contrastBlack":19.56,"contrastWhite":1.07,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"Neon Yellow","hex":"#FFF01F","family":"yellow","bestTextColor":"#000000","contrastBlack":17.74,"contrastWhite":1.18,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"Maize","hex":"#FBEC5D","family":"yellow","bestTextColor":"#000000","contrastBlack":17.26,"contrastWhite":1.22,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]}]

AI context

{"semanticGroups":["warm yellow","vibrant","vibrant yellow","Daffodil 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/ffff31.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/daffodil.json","https://www.colorsencyclopedia.com/api/colors/neon-yellow.json","https://www.colorsencyclopedia.com/api/colors/dandelion.json"]}

Harmonies

{"complementary":"#3333FF","analogous":["#FF9933","#99FF33"],"triadic":["#33FFFF","#FF33FF"],"tetradic":["#33FF99","#3333FF","#FF3399"],"splitComplementary":["#3399FF","#9933FF"],"monochromatic":["#FFFF8F","#FFFF31","#D6D600"]}

Variants

{"light":"#FFFF8F","dark":"#D6D600","saturated":"#FFFF33","desaturated":"#E9E949","pastel":"#F9F9B8","neon":"#FFFF5C"}

Nearest named colors

[{"slug":"daffodil","name":"Daffodil","hex":"#FFFF31","distance":0},{"slug":"neon-yellow","name":"Neon Yellow","hex":"#FFF01F","distance":23.430749027719962},{"slug":"dandelion","name":"Dandelion","hex":"#F0E130","distance":33.555923471125034},{"slug":"maize","name":"Maize","hex":"#FBEC5D","distance":48.093658625644196},{"slug":"yellow","name":"Yellow","hex":"#FFFF00","distance":49}]

HEX meaning and use

About #FFFF31

#FFFF31 is classified as a warm yellow value with vibrant visual character. #FFFF31 is visually closest to Daffodil, a named yellow color with HEX #FFFF31.

The RGB channels are 255, 255, and 49, with red carrying the strongest channel weight. In HSL, the hue is 60deg with 100% saturation and 60% 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 0.93, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 0.00, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text19.6:1AA Pass

White text1.07:1AA Fail

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

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

Accessibility-Safe Pairings and Alternatives

Use these pairings when #FFFF31 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#00000019.6:1 · AAA

White text#FFFFFF1.07:1 · Fail

Accessible Alternatives

#FFFF8F#000000 text · best 19.95:1#FFFF8F

#FFFF33#000000 text · best 19.6:1#FFFF33

Yellow#000000 text · best 19.56:1#FFFF00

Neon Yellow#000000 text · best 17.74:1#FFF01F

Maize#000000 text · best 17.26:1#FBEC5D

Generated Palette

Daffodil#FFFF31

#3333FF#3333FF

#FF9933#FF9933

#99FF33#99FF33

#FFFF8F#FFFF8F

#D6D600#D6D600

Color Harmonies

#3333FF#3333FF

#FF9933#FF9933

#99FF33#99FF33

#33FFFF#33FFFF

#FF33FF#FF33FF

Variants

#FFFF8F#FFFF8F

#D6D600#D6D600

#FFFF33#FFFF33

#E9E949#E9E949

#F9F9B8#F9F9B8

#FFFF5C#FFFF5C

Nearest Named Colors

Daffodil#FFFF31

Neon Yellow#FFF01F

Dandelion#F0E130

Maize#FBEC5D

Yellow#FFFF00

#FFFF31

CSS

Machine-Readable HEX Data (JSON)

About #FFFF31

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides