#EFF399#EFF399

#EFF399 is a very light, moderate yellow. Relative luminance 0.848; OKLCH L 94.1% C 0.112 H 110.6°. Best body text is #000000 at 17.95:1 contrast (WCAG AA passes).

Color values

HEX	#EFF399
RGB	rgb(239, 243, 153)
HSL	hsl(63, 79%, 78%)
HSV	hsv(63, 37%, 95%)
CMYK	cmyk(1.6%, 0%, 37%, 4.7%)
CIE-LAB	lab(93.78, -14.45, 42.97)
CIE-LCH	lch(93.78, 45.33, 108.59°)
OKLab	oklab(94.13% -0.0394 0.1052)
OKLCH	oklch(94.13% 0.112 110.6)
XYZ	xyz(73.3977, 84.7530, 42.6233)
Luminance	0.8475 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF399 #9D99F3

analogous

#F3CA99 #EFF399 #C2F399

triadic

#EFF399 #99EFF3 #F399EF

tetradic

#EFF399 #99F3CA #9D99F3 #F399C2

square

#EFF399 #99F3CA #9D99F3 #F399C2

split-complementary

#EFF399 #99C2F3 #CA99F3

monochromatic

#DEE62B #E6ED62 #EFF399 #F8F9D0 #FBFCE4

Accessibility & contrast

On white

1.17

#EFF399 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.95

#EFF399 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF399

17.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF399	#FFFFFF	#000000	##000000
##EFF399	1.00	1.17	17.95	17.95
#FFFFFF	1.17	1.00	21.00	21.00
#000000	17.95	21.00	1.00	1.00
##000000	17.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEC92

Deuteranopia (green-blind)

#FFEF9D

Tritanopia (blue-blind)

#FAE9DD

Achromatopsia (no color)

#EDEDED

Design tokens & code

CSS

--color: #eff399;
/* rgb */ color: rgb(239, 243, 153);
/* oklch */ color: oklch(94.1% 0.112 110.6);

Tailwind

colors: {
  custom: {
    50: '#f5f7b8',
    500: '#eff399',
    950: '#000000',
  },
}

SCSS

$custom: #eff399;
$custom-light: #f5f7b8;
$custom-dark: #000000;

JSON

{
  "hex": "#eff399",
  "rgb": {
    "r": 239,
    "g": 243,
    "b": 153
  },
  "hsl": {
    "h": 62.667,
    "s": 78.947,
    "l": 77.647
  },
  "oklch": {
    "l": 0.94128,
    "c": 0.11234,
    "h": 110.6
  },
  "luminance": 0.84752
}

Semantic roles & 50–950 ramp

primary

#EFF399

secondary

#645FD1

accent

#0ADB14

background

#FFFFFD

surface

#FFFEF8

border

#D7D6D1

text

#171711

muted

#858581

Preview Lab

Preview with #EFF399

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

Preview Lab → · Contrast checker → · Palette generator →