#EFF58A#EFF58A

#EFF58A is a very light, vivid yellow. Relative luminance 0.855; OKLCH L 94.3% C 0.131 H 111.5°. Best body text is #000000 at 18.10:1 contrast (WCAG AA passes).

Color values

HEX	#EFF58A
RGB	rgb(239, 245, 138)
HSL	hsl(63, 84%, 75%)
HSV	hsv(63, 44%, 96%)
CMYK	cmyk(2.4%, 0%, 43.7%, 3.9%)
CIE-LAB	lab(94.09, -16.99, 50.63)
CIE-LCH	lch(94.09, 53.40, 108.55°)
OKLab	oklab(94.32% -0.0478 0.1217)
OKLCH	oklch(94.32% 0.131 111.5)
XYZ	xyz(72.8376, 85.4918, 36.7044)
Luminance	0.8549 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF58A #908AF5

analogous

#F5C58A #EFF58A #BAF58A

triadic

#EFF58A #8AEFF5 #F58AEF

tetradic

#EFF58A #8AF5C5 #908AF5 #F58ABA

square

#EFF58A #8AF5C5 #908AF5 #F58ABA

split-complementary

#EFF58A #8ABAF5 #C58AF5

monochromatic

#E0EB19 #E7F052 #EFF58A #F7FAC2 #FBFDE3

Accessibility & contrast

On white

1.16

#EFF58A on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.10

#EFF58A on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF58A

18.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF58A	#FFFFFF	#000000	##000000
##EFF58A	1.00	1.16	18.10	18.10
#FFFFFF	1.16	1.00	21.00	21.00
#000000	18.10	21.00	1.00	1.00
##000000	18.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEC81

Deuteranopia (green-blind)

#FFF08F

Tritanopia (blue-blind)

#FBEADC

Achromatopsia (no color)

#EEEEEE

Design tokens & code

CSS

--color: #eff58a;
/* rgb */ color: rgb(239, 245, 138);
/* oklch */ color: oklch(94.3% 0.131 111.5);

Tailwind

colors: {
  custom: {
    50: '#f6f8ae',
    500: '#eff58a',
    950: '#000000',
  },
}

SCSS

$custom: #eff58a;
$custom-light: #f6f8ae;
$custom-dark: #000000;

JSON

{
  "hex": "#eff58a",
  "rgb": {
    "r": 239,
    "g": 245,
    "b": 138
  },
  "hsl": {
    "h": 63.364,
    "s": 84.252,
    "l": 75.098
  },
  "oklch": {
    "l": 0.94316,
    "c": 0.13076,
    "h": 111.5
  },
  "luminance": 0.85491
}

Semantic roles & 50–950 ramp

primary

#EFF58A

secondary

#5851D2

accent

#05E111

background

#FFFFFD

surface

#FFFEF7

border

#D7D6D0

text

#171710

muted

#858581

Preview Lab

Preview with #EFF58A

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

Preview Lab → · Contrast checker → · Palette generator →