#EFFD5B#EFFD5B

#EFFD5B is a very light, vivid yellow. Relative luminance 0.894; OKLCH L 95.5% C 0.181 H 114.0°. Best body text is #000000 at 18.87:1 contrast (WCAG AA passes).

Color values

HEX	#EFFD5B
RGB	rgb(239, 253, 91)
HSL	hsl(65, 98%, 67%)
HSV	hsv(65, 64%, 99%)
CMYK	cmyk(5.5%, 0%, 64%, 0.8%)
CIE-LAB	lab(95.73, -24.51, 72.98)
CIE-LCH	lch(95.73, 76.99, 108.57°)
OKLab	oklab(95.48% -0.0736 0.165)
OKLCH	oklch(95.48% 0.181 114)
XYZ	xyz(72.6121, 89.3579, 23.3182)
Luminance	0.8936 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFFD5B #695BFD

analogous

#FDBA5B #EFFD5B #9EFD5B

triadic

#EFFD5B #5BEFFD #FD5BEF

tetradic

#EFFD5B #5BFDBA #695BFD #FD5B9E

square

#EFFD5B #5BFDBA #695BFD #FD5B9E

split-complementary

#EFFD5B #5B9EFD #BA5BFD

monochromatic

#C8DB03 #E9FC1F #EFFD5B #F5FE97 #FBFED4

Accessibility & contrast

On white

1.11

#EFFD5B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.87

#EFFD5B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFFD5B

18.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFFD5B	#FFFFFF	#000000	##000000
##EFFD5B	1.00	1.11	18.87	18.87
#FFFFFF	1.11	1.00	21.00	21.00
#000000	18.87	21.00	1.00	1.00
##000000	18.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF145

Deuteranopia (green-blind)

#FFF466

Tritanopia (blue-blind)

#FEEFDC

Achromatopsia (no color)

#F3F3F3

Design tokens & code

CSS

--color: #effd5b;
/* rgb */ color: rgb(239, 253, 91);
/* oklch */ color: oklch(95.5% 0.181 114.0);

Tailwind

colors: {
  custom: {
    50: '#f8fd91',
    500: '#effd5b',
    950: '#000000',
  },
}

SCSS

$custom: #effd5b;
$custom-light: #f8fd91;
$custom-dark: #000000;

JSON

{
  "hex": "#effd5b",
  "rgb": {
    "r": 239,
    "g": 253,
    "b": 91
  },
  "hsl": {
    "h": 65.185,
    "s": 97.59,
    "l": 67.451
  },
  "oklch": {
    "l": 0.95475,
    "c": 0.18071,
    "h": 114
  },
  "luminance": 0.89357
}

Semantic roles & 50–950 ramp

primary

#EFFD5B

secondary

#3728D4

accent

#00E614

background

#FFFFFC

surface

#FFFFF4

border

#D7D7CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #EFFD5B

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

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