HEX atlas value

#EFFB41

#EFFB41 is a warm yellow HEX color close to Daffodil. According to Colors Encyclopedia, it converts to RGB 239, 251, 65, HSL 64, 96%, 62%, has luminance 0.8773, and belongs to the vibrant group.

yellow warm vibrant

#EFFB41 Sample readable text

HEX #EFFB41

RGB rgb(239, 251, 65)

HSL hsl(64 96% 62%)

CMYK cmyk(5, 0, 74, 2)

Luminance 0.8773

Contrast Black 18.55:1White 1.13:1

CSS

--color-effb41: #EFFB41;
.background-effb41 { background-color: #EFFB41; }
.text-effb41 { color: #EFFB41; }

Luminance0.8773

Black text18.55:1AA Pass

White text1.13:1AA 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":"#EFFB41","rgb":[239,251,65],"hsl":[64,96,62],"cmyk":[5,0,74,2],"luminance":0.8773,"contrast":{"black":18.55,"white":1.13}}

WCAG

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

Safe pairings

[{"name":"Black text","hex":"#000000","contrast":18.55,"wcagAA":true,"wcagAAA":true},{"name":"White text","hex":"#FFFFFF","contrast":1.13,"wcagAA":false,"wcagAAA":false}]

Accessible alternatives

[{"name":"Laser Lemon","hex":"#FFFF66","family":"yellow","bestTextColor":"#000000","contrastBlack":19.75,"contrastWhite":1.06,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"Daffodil","hex":"#FFFF31","family":"yellow","bestTextColor":"#000000","contrastBlack":19.6,"contrastWhite":1.07,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#F6FD9B","hex":"#F6FD9B","family":"yellow","bestTextColor":"#000000","contrastBlack":19.44,"contrastWhite":1.08,"wcagAA":["#000000","#1A1A1A","#36454F"],"wcagAAA":["#000000","#1A1A1A","#36454F"]},{"name":"#F2FF3D","hex":"#F2FF3D","family":"yellow","bestTextColor":"#000000","contrastBlack":19.15,"contrastWhite":1.1,"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"]}]

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/effb41.json","https://www.colorsencyclopedia.com/api/hex.json","https://www.colorsencyclopedia.com/api/colors/daffodil.json","https://www.colorsencyclopedia.com/api/colors/dandelion.json","https://www.colorsencyclopedia.com/api/colors/maize.json"]}

Harmonies

{"complementary":"#4D41FB","analogous":["#FBAB41","#92FB41"],"triadic":["#41EFFB","#FB41EF"],"tetradic":["#41FBAB","#4D41FB","#FB4192"],"splitComplementary":["#4192FB","#AB41FB"],"monochromatic":["#F6FD9B","#EFFB41","#CEDC04"]}

Variants

{"light":"#F6FD9B","dark":"#CEDC04","saturated":"#F2FF3D","desaturated":"#DCE656","pastel":"#F5F9C3","neon":"#F5FF66"}

Nearest named colors

[{"slug":"daffodil","name":"Daffodil","hex":"#FFFF31","distance":22.978250586152114},{"slug":"dandelion","name":"Dandelion","hex":"#F0E130","distance":31.080540535840107},{"slug":"maize","name":"Maize","hex":"#FBEC5D","distance":33.95585369269929},{"slug":"neon-yellow","name":"Neon Yellow","hex":"#FFF01F","distance":39.153543900903784},{"slug":"laser-lemon","name":"Laser Lemon","hex":"#FFFF66","distance":40.50925820105819}]

HEX meaning and use

About #EFFB41

#EFFB41 is classified as a warm yellow value with vibrant visual character. #EFFB41 is visually closest to Daffodil, a named yellow color with HEX #FFFF31.

The RGB channels are 239, 251, and 65, with green carrying the strongest channel weight. In HSL, the hue is 64deg with 96% saturation and 62% 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 0.8773, black text provides the stronger contrast for readable interface or documentation use, and Its nearest named-color distance is 22.98, which helps separate this atlas value from adjacent named color records.

WCAG Accessibility

Black text18.55:1AA Pass

White text1.13:1AA Fail

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

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

Accessibility-Safe Pairings and Alternatives

Use these pairings when #EFFB41 needs readable text, badges, interface states, or nearby accessible alternatives.

Black text#00000018.55:1 · AAA

White text#FFFFFF1.13:1 · Fail

Accessible Alternatives

Laser Lemon#000000 text · best 19.75:1#FFFF66

Daffodil#000000 text · best 19.6:1#FFFF31

#F6FD9B#000000 text · best 19.44:1#F6FD9B

#F2FF3D#000000 text · best 19.15:1#F2FF3D

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

Generated Palette

#EFFB41#EFFB41

#4D41FB#4D41FB

#FBAB41#FBAB41

#92FB41#92FB41

#F6FD9B#F6FD9B

#CEDC04#CEDC04

Color Harmonies

#4D41FB#4D41FB

#FBAB41#FBAB41

#92FB41#92FB41

#41EFFB#41EFFB

#FB41EF#FB41EF

Variants

#F6FD9B#F6FD9B

#CEDC04#CEDC04

#F2FF3D#F2FF3D

#DCE656#DCE656

#F5F9C3#F5F9C3

#F5FF66#F5FF66

Nearest Named Colors

Daffodil#FFFF31

Dandelion#F0E130

Maize#FBEC5D

Neon Yellow#FFF01F

Laser Lemon#FFFF66

#EFFB41

CSS

Machine-Readable HEX Data (JSON)

About #EFFB41

WCAG Accessibility

Accessibility-Safe Pairings and Alternatives

Accessible Alternatives

Generated Palette

Color Harmonies

Variants

Nearest Named Colors

Related HEX Guides