#EFFE59#EFFE59
#EFFE59 is a very light, vivid yellow. Relative luminance 0.900; OKLCH L 95.7% C 0.183 H 114.3°. Best body text is #000000 at 18.99:1 contrast (WCAG AA passes).
Color values
| HEX | #EFFE59 |
|---|---|
| RGB | rgb(239, 254, 89) |
| HSL | hsl(65, 99%, 67%) |
| HSV | hsv(65, 65%, 100%) |
| CMYK | cmyk(5.9%, 0%, 65%, 0.4%) |
| CIE-LAB | lab(95.98, -25.10, 74.00) |
| CIE-LCH | lch(95.98, 78.14, 108.74°) |
| OKLab | oklab(95.67% -0.0755 0.1669) |
| OKLCH | oklch(95.67% 0.183 114.3) |
| XYZ | xyz(72.8435, 89.9569, 22.9754) |
| Luminance | 0.8996 (WCAG relative) |
| Temperature | warm |
| Family | yellow |
Closest named colors
Canary
#FDFF63
ΔE00 2.73
Banana Yellow
#FAFE4B
ΔE00 2.84
Lemon (survey)
#FDFF52
ΔE00 3.03
Pastel Yellow
#FFFE71
ΔE00 3.68
Off Yellow
#F1F33F
ΔE00 3.75
Butter Yellow
#FFFD74
ΔE00 4.03
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#EFFE59 #6859FE
analogous
#FEBB59 #EFFE59 #9CFE59
triadic
#EFFE59 #59EFFE #FE59EF
tetradic
#EFFE59 #59FEBB #6859FE #FE599C
square
#EFFE59 #59FEBB #6859FE #FE599C
split-complementary
#EFFE59 #599CFE #BB59FE
monochromatic
#C7DB01 #E9FE1C #EFFE59 #F5FE96 #FBFFD3
Accessibility & contrast
On white
1.11
#EFFE59 on #FFFFFF
AA ✗AA large ✗AAA ✗
On black
18.99
#EFFE59 on #000000
AA ✓AA large ✓AAA ✓
Best text color
#000000 on #EFFE59
18.99:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##EFFE59 | #FFFFFF | #000000 | ##000000 |
|---|---|---|---|---|
| ##EFFE59 | 1.00 | 1.11 | 18.99 | 18.99 |
| #FFFFFF | 1.11 | 1.00 | 21.00 | 21.00 |
| #000000 | 18.99 | 21.00 | 1.00 | 1.00 |
| ##000000 | 18.99 | 21.00 | 1.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#FFF242
Deuteranopia (green-blind)
#FFF565
Tritanopia (blue-blind)
#FEF0DD
Achromatopsia (no color)
#F3F3F3
Design tokens & code
CSS
--color: #effe59; /* rgb */ color: rgb(239, 254, 89); /* oklch */ color: oklch(95.7% 0.183 114.3);
Tailwind
colors: {
custom: {
50: '#f8fe90',
500: '#effe59',
950: '#000000',
},
}SCSS
$custom: #effe59; $custom-light: #f8fe90; $custom-dark: #000000;
JSON
{
"hex": "#effe59",
"rgb": {
"r": 239,
"g": 254,
"b": 89
},
"hsl": {
"h": 65.455,
"s": 98.802,
"l": 67.255
},
"oklch": {
"l": 0.9567,
"c": 0.18316,
"h": 114.3
},
"luminance": 0.89956
}Semantic roles & 50–950 ramp
primary
#EFFE59
secondary
#3727D4
accent
#00E615
background
#FFFFFC
surface
#FFFFF4
border
#D7D7CE
text
#18170D
muted
#86857F