#EFF55B#EFF55B

#EFF55B is a very light, vivid yellow. Relative luminance 0.844; OKLCH L 93.8% C 0.172 H 111.4°. Best body text is #000000 at 17.88:1 contrast (WCAG AA passes).

Color values

HEX	#EFF55B
RGB	rgb(239, 245, 91)
HSL	hsl(62, 89%, 66%)
HSV	hsv(62, 63%, 96%)
CMYK	cmyk(2.4%, 0%, 62.9%, 3.9%)
CIE-LAB	lab(93.63, -20.71, 70.78)
CIE-LCH	lch(93.63, 73.75, 106.31°)
OKLab	oklab(93.79% -0.063 0.1604)
OKLCH	oklch(93.79% 0.172 111.4)
XYZ	xyz(70.1394, 84.4125, 22.4940)
Luminance	0.8441 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF55B #615BF5

analogous

#F5AE5B #EFF55B #A2F55B

triadic

#EFF55B #5BEFF5 #F55BEF

tetradic

#EFF55B #5BF5AE #615BF5 #F55BA2

square

#EFF55B #5BF5AE #615BF5 #F55BA2

split-complementary

#EFF55B #5BA2F5 #AE5BF5

monochromatic

#C2C90C #E9F121 #EFF55B #F5F995 #FAFCCE

Accessibility & contrast

On white

1.17

#EFF55B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.88

#EFF55B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF55B

17.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF55B	#FFFFFF	#000000	##000000
##EFF55B	1.00	1.17	17.88	17.88
#FFFFFF	1.17	1.00	21.00	21.00
#000000	17.88	21.00	1.00	1.00
##000000	17.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEB47

Deuteranopia (green-blind)

#FFEF65

Tritanopia (blue-blind)

#FEE7D5

Achromatopsia (no color)

#EDEDED

Design tokens & code

CSS

--color: #eff55b;
/* rgb */ color: rgb(239, 245, 91);
/* oklch */ color: oklch(93.8% 0.172 111.4);

Tailwind

colors: {
  custom: {
    50: '#f7f890',
    500: '#eff55b',
    950: '#000000',
  },
}

SCSS

$custom: #eff55b;
$custom-light: #f7f890;
$custom-dark: #000000;

JSON

{
  "hex": "#eff55b",
  "rgb": {
    "r": 239,
    "g": 245,
    "b": 91
  },
  "hsl": {
    "h": 62.338,
    "s": 88.506,
    "l": 65.882
  },
  "oklch": {
    "l": 0.93794,
    "c": 0.17232,
    "h": 111.4
  },
  "luminance": 0.84411
}

Semantic roles & 50–950 ramp

primary

#EFF55B

secondary

#342EC6

accent

#00E509

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #EFF55B

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

Preview Lab → · Contrast checker → · Palette generator →