#EFF578#EFF578

#EFF578 is a very light, vivid yellow. Relative luminance 0.850; OKLCH L 94.1% C 0.148 H 111.4°. Best body text is #000000 at 18.00:1 contrast (WCAG AA passes).

Color values

HEX	#EFF578
RGB	rgb(239, 245, 120)
HSL	hsl(63, 86%, 72%)
HSV	hsv(63, 51%, 96%)
CMYK	cmyk(2.4%, 0%, 51%, 3.9%)
CIE-LAB	lab(93.89, -18.62, 58.74)
CIE-LCH	lch(93.89, 61.63, 107.59°)
OKLab	oklab(94.09% -0.0541 0.1381)
OKLCH	oklch(94.09% 0.148 111.4)
XYZ	xyz(71.6407, 85.0131, 30.4009)
Luminance	0.8501 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF578 #7E78F5

analogous

#F5BD78 #EFF578 #B1F578

triadic

#EFF578 #78EFF5 #F578EF

tetradic

#EFF578 #78F5BD #7E78F5 #F578B1

square

#EFF578 #78F5BD #7E78F5 #F578B1

split-complementary

#EFF578 #78B1F5 #BD78F5

monochromatic

#D8E211 #E8F13F #EFF578 #F6F9B1 #FCFDE3

Accessibility & contrast

On white

1.17

#EFF578 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.00

#EFF578 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF578

18.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF578	#FFFFFF	#000000	##000000
##EFF578	1.00	1.17	18.00	18.00
#FFFFFF	1.17	1.00	21.00	21.00
#000000	18.00	21.00	1.00	1.00
##000000	18.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEC6C

Deuteranopia (green-blind)

#FFEF7F

Tritanopia (blue-blind)

#FDE8D9

Achromatopsia (no color)

#EDEDED

Design tokens & code

CSS

--color: #eff578;
/* rgb */ color: rgb(239, 245, 120);
/* oklch */ color: oklch(94.1% 0.148 111.4);

Tailwind

colors: {
  custom: {
    50: '#f6f8a2',
    500: '#eff578',
    950: '#000000',
  },
}

SCSS

$custom: #eff578;
$custom-light: #f6f8a2;
$custom-dark: #000000;

JSON

{
  "hex": "#eff578",
  "rgb": {
    "r": 239,
    "g": 245,
    "b": 120
  },
  "hsl": {
    "h": 62.88,
    "s": 86.207,
    "l": 71.569
  },
  "oklch": {
    "l": 0.94085,
    "c": 0.14836,
    "h": 111.4
  },
  "luminance": 0.85012
}

Semantic roles & 50–950 ramp

primary

#EFF578

secondary

#4841D0

accent

#03E30E

background

#FFFFFC

surface

#FFFEF6

border

#D7D6D0

text

#17170F

muted

#858580

Preview Lab

Preview with #EFF578

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

Preview Lab → · Contrast checker → · Palette generator →