#EFF58B#EFF58B

#EFF58B is a very light, vivid yellow. Relative luminance 0.855; OKLCH L 94.3% C 0.130 H 111.5°. Best body text is #000000 at 18.10:1 contrast (WCAG AA passes).

Color values

HEX	#EFF58B
RGB	rgb(239, 245, 139)
HSL	hsl(63, 84%, 75%)
HSV	hsv(63, 43%, 96%)
CMYK	cmyk(2.4%, 0%, 43.3%, 3.9%)
CIE-LAB	lab(94.11, -16.89, 50.16)
CIE-LCH	lch(94.11, 52.93, 108.61°)
OKLab	oklab(94.33% -0.0475 0.1207)
OKLCH	oklch(94.33% 0.13 111.5)
XYZ	xyz(72.9103, 85.5209, 37.0874)
Luminance	0.8552 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF58B #918BF5

analogous

#F5C68B #EFF58B #BAF58B

triadic

#EFF58B #8BEFF5 #F58BEF

tetradic

#EFF58B #8BF5C6 #918BF5 #F58BBA

square

#EFF58B #8BF5C6 #918BF5 #F58BBA

split-complementary

#EFF58B #8BBAF5 #C68BF5

monochromatic

#DFEB1A #E7F053 #EFF58B #F7FAC3 #FBFDE3

Accessibility & contrast

On white

1.16

#EFF58B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.10

#EFF58B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF58B

18.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF58B	#FFFFFF	#000000	##000000
##EFF58B	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)

#FFEC82

Deuteranopia (green-blind)

#FFF090

Tritanopia (blue-blind)

#FBEADC

Achromatopsia (no color)

#EEEEEE

Design tokens & code

CSS

--color: #eff58b;
/* rgb */ color: rgb(239, 245, 139);
/* oklch */ color: oklch(94.3% 0.130 111.5);

Tailwind

colors: {
  custom: {
    50: '#f6f8af',
    500: '#eff58b',
    950: '#000000',
  },
}

SCSS

$custom: #eff58b;
$custom-light: #f6f8af;
$custom-dark: #000000;

JSON

{
  "hex": "#eff58b",
  "rgb": {
    "r": 239,
    "g": 245,
    "b": 139
  },
  "hsl": {
    "h": 63.396,
    "s": 84.127,
    "l": 75.294
  },
  "oklch": {
    "l": 0.9433,
    "c": 0.12972,
    "h": 111.5
  },
  "luminance": 0.8552
}

Semantic roles & 50–950 ramp

primary

#EFF58B

secondary

#5952D2

accent

#05E111

background

#FFFFFD

surface

#FFFEF7

border

#D7D6D0

text

#171710

muted

#858581

Preview Lab

Preview with #EFF58B

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

Preview Lab → · Contrast checker → · Palette generator →