#EFF579#EFF579

#EFF579 is a very light, vivid yellow. Relative luminance 0.850; OKLCH L 94.1% C 0.147 H 111.4°. Best body text is #000000 at 18.01:1 contrast (WCAG AA passes).

Color values

HEX	#EFF579
RGB	rgb(239, 245, 121)
HSL	hsl(63, 86%, 72%)
HSV	hsv(63, 51%, 96%)
CMYK	cmyk(2.4%, 0%, 50.6%, 3.9%)
CIE-LAB	lab(93.90, -18.54, 58.30)
CIE-LCH	lch(93.90, 61.18, 107.64°)
OKLab	oklab(94.1% -0.0538 0.1373)
OKLCH	oklch(94.1% 0.147 111.4)
XYZ	xyz(71.7017, 85.0375, 30.7222)
Luminance	0.8504 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF579 #7F79F5

analogous

#F5BD79 #EFF579 #B1F579

triadic

#EFF579 #79EFF5 #F579EF

tetradic

#EFF579 #79F5BD #7F79F5 #F579B1

square

#EFF579 #79F5BD #7F79F5 #F579B1

split-complementary

#EFF579 #79B1F5 #BD79F5

monochromatic

#D9E311 #E8F140 #EFF579 #F6F9B2 #FCFDE3

Accessibility & contrast

On white

1.17

#EFF579 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.01

#EFF579 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF579

18.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF579	#FFFFFF	#000000	##000000
##EFF579	1.00	1.17	18.01	18.01
#FFFFFF	1.17	1.00	21.00	21.00
#000000	18.01	21.00	1.00	1.00
##000000	18.01	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEC6D

Deuteranopia (green-blind)

#FFEF80

Tritanopia (blue-blind)

#FDE8D9

Achromatopsia (no color)

#EDEDED

Design tokens & code

CSS

--color: #eff579;
/* rgb */ color: rgb(239, 245, 121);
/* oklch */ color: oklch(94.1% 0.147 111.4);

Tailwind

colors: {
  custom: {
    50: '#f6f8a3',
    500: '#eff579',
    950: '#000000',
  },
}

SCSS

$custom: #eff579;
$custom-light: #f6f8a3;
$custom-dark: #000000;

JSON

{
  "hex": "#eff579",
  "rgb": {
    "r": 239,
    "g": 245,
    "b": 121
  },
  "hsl": {
    "h": 62.903,
    "s": 86.111,
    "l": 71.765
  },
  "oklch": {
    "l": 0.94097,
    "c": 0.14742,
    "h": 111.4
  },
  "luminance": 0.85036
}

Semantic roles & 50–950 ramp

primary

#EFF579

secondary

#4942D0

accent

#03E30E

background

#FFFFFC

surface

#FFFEF6

border

#D7D6D0

text

#17170F

muted

#858580

Preview Lab

Preview with #EFF579

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

Preview Lab → · Contrast checker → · Palette generator →