#EFFD59#EFFD59

#EFFD59 is a very light, vivid yellow. Relative luminance 0.893; OKLCH L 95.5% C 0.182 H 114.0°. Best body text is #000000 at 18.86:1 contrast (WCAG AA passes).

Color values

HEX	#EFFD59
RGB	rgb(239, 253, 89)
HSL	hsl(65, 98%, 67%)
HSV	hsv(65, 65%, 99%)
CMYK	cmyk(5.5%, 0%, 64.8%, 0.8%)
CIE-LAB	lab(95.72, -24.63, 73.73)
CIE-LCH	lch(95.72, 77.73, 108.47°)
OKLab	oklab(95.46% -0.0741 0.1663)
OKLCH	oklch(95.46% 0.182 114)
XYZ	xyz(72.5270, 89.3239, 22.8699)
Luminance	0.8932 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFD59 #6759FD

analogous

#FDB959 #EFFD59 #9DFD59

triadic

#EFFD59 #59EFFD #FD59EF

tetradic

#EFFD59 #59FDB9 #6759FD #FD599D

square

#EFFD59 #59FDB9 #6759FD #FD599D

split-complementary

#EFFD59 #599DFD #B959FD

monochromatic

#C7D903 #E9FC1D #EFFD59 #F5FE95 #FBFED2

Accessibility & contrast

On white

1.11

#EFFD59 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.86

#EFFD59 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFD59

18.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFD59	#FFFFFF	#000000	##000000
##EFFD59	1.00	1.11	18.86	18.86
#FFFFFF	1.11	1.00	21.00	21.00
#000000	18.86	21.00	1.00	1.00
##000000	18.86	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF142

Deuteranopia (green-blind)

#FFF464

Tritanopia (blue-blind)

#FEEFDC

Achromatopsia (no color)

#F3F3F3

Design tokens & code

CSS

--color: #effd59;
/* rgb */ color: rgb(239, 253, 89);
/* oklch */ color: oklch(95.5% 0.182 114.0);

Tailwind

colors: {
  custom: {
    50: '#f8fd90',
    500: '#effd59',
    950: '#000000',
  },
}

SCSS

$custom: #effd59;
$custom-light: #f8fd90;
$custom-dark: #000000;

JSON

{
  "hex": "#effd59",
  "rgb": {
    "r": 239,
    "g": 253,
    "b": 89
  },
  "hsl": {
    "h": 65.122,
    "s": 97.619,
    "l": 67.059
  },
  "oklch": {
    "l": 0.95459,
    "c": 0.1821,
    "h": 114
  },
  "luminance": 0.89323
}

Semantic roles & 50–950 ramp

primary

#EFFD59

secondary

#3628D3

accent

#00E614

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #EFFD59

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →