#EFF39B#EFF39B

#EFF39B is a very light, moderate yellow. Relative luminance 0.848; OKLCH L 94.2% C 0.110 H 110.6°. Best body text is #000000 at 17.96:1 contrast (WCAG AA passes).

Color values

HEX	#EFF39B
RGB	rgb(239, 243, 155)
HSL	hsl(63, 79%, 78%)
HSV	hsv(63, 36%, 95%)
CMYK	cmyk(1.6%, 0%, 36.2%, 4.7%)
CIE-LAB	lab(93.81, -14.23, 42.02)
CIE-LCH	lch(93.81, 44.36, 108.71°)
OKLab	oklab(94.16% -0.0387 0.1031)
OKLCH	oklch(94.16% 0.11 110.6)
XYZ	xyz(73.5643, 84.8197, 43.5005)
Luminance	0.8482 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF39B #9F9BF3

analogous

#F3CB9B #EFF39B #C3F39B

triadic

#EFF39B #9BEFF3 #F39BEF

tetradic

#EFF39B #9BF3CB #9F9BF3 #F39BC3

square

#EFF39B #9BF3CB #9F9BF3 #F39BC3

split-complementary

#EFF39B #9BC3F3 #CB9BF3

monochromatic

#DEE62E #E6EC64 #EFF39B #F8FAD2 #FBFCE4

Accessibility & contrast

On white

1.17

#EFF39B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.96

#EFF39B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF39B

17.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF39B	#FFFFFF	#000000	##000000
##EFF39B	1.00	1.17	17.96	17.96
#FFFFFF	1.17	1.00	21.00	21.00
#000000	17.96	21.00	1.00	1.00
##000000	17.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEC95

Deuteranopia (green-blind)

#FFEF9F

Tritanopia (blue-blind)

#FAE9DD

Achromatopsia (no color)

#EDEDED

Design tokens & code

CSS

--color: #eff39b;
/* rgb */ color: rgb(239, 243, 155);
/* oklch */ color: oklch(94.2% 0.110 110.6);

Tailwind

colors: {
  custom: {
    50: '#f5f7b9',
    500: '#eff39b',
    950: '#000000',
  },
}

SCSS

$custom: #eff39b;
$custom-light: #f5f7b9;
$custom-dark: #000000;

JSON

{
  "hex": "#eff39b",
  "rgb": {
    "r": 239,
    "g": 243,
    "b": 155
  },
  "hsl": {
    "h": 62.727,
    "s": 78.571,
    "l": 78.039
  },
  "oklch": {
    "l": 0.9416,
    "c": 0.11012,
    "h": 110.6
  },
  "luminance": 0.84818
}

Semantic roles & 50–950 ramp

primary

#EFF39B

secondary

#6661D1

accent

#0BDB14

background

#FFFFFD

surface

#FFFEF8

border

#D7D6D1

text

#171711

muted

#858581

Preview Lab

Preview with #EFF39B

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

Preview Lab → · Contrast checker → · Palette generator →