#EFF577#EFF577

#EFF577 is a very light, vivid yellow. Relative luminance 0.850; OKLCH L 94.1% C 0.149 H 111.4°. Best body text is #000000 at 18.00:1 contrast (WCAG AA passes).

Color values

HEX	#EFF577
RGB	rgb(239, 245, 119)
HSL	hsl(63, 86%, 71%)
HSV	hsv(63, 51%, 96%)
CMYK	cmyk(2.4%, 0%, 51.4%, 3.9%)
CIE-LAB	lab(93.88, -18.71, 59.18)
CIE-LCH	lch(93.88, 62.07, 107.54°)
OKLab	oklab(94.07% -0.0545 0.139)
OKLCH	oklch(94.07% 0.149 111.4)
XYZ	xyz(71.5803, 84.9889, 30.0830)
Luminance	0.8499 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF577 #7D77F5

analogous

#F5BC77 #EFF577 #B0F577

triadic

#EFF577 #77EFF5 #F577EF

tetradic

#EFF577 #77F5BC #7D77F5 #F577B0

square

#EFF577 #77F5BC #7D77F5 #F577B0

split-complementary

#EFF577 #77B0F5 #BC77F5

monochromatic

#D7E111 #E8F13E #EFF577 #F6F9B0 #FCFDE2

Accessibility & contrast

On white

1.17

#EFF577 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.00

#EFF577 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF577

18.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF577	#FFFFFF	#000000	##000000
##EFF577	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)

#FFEC6B

Deuteranopia (green-blind)

#FFEF7E

Tritanopia (blue-blind)

#FDE8D9

Achromatopsia (no color)

#EDEDED

Design tokens & code

CSS

--color: #eff577;
/* rgb */ color: rgb(239, 245, 119);
/* oklch */ color: oklch(94.1% 0.149 111.4);

Tailwind

colors: {
  custom: {
    50: '#f6f8a1',
    500: '#eff577',
    950: '#000000',
  },
}

SCSS

$custom: #eff577;
$custom-light: #f6f8a1;
$custom-dark: #000000;

JSON

{
  "hex": "#eff577",
  "rgb": {
    "r": 239,
    "g": 245,
    "b": 119
  },
  "hsl": {
    "h": 62.857,
    "s": 86.301,
    "l": 71.373
  },
  "oklch": {
    "l": 0.94073,
    "c": 0.14928,
    "h": 111.4
  },
  "luminance": 0.84987
}

Semantic roles & 50–950 ramp

primary

#EFF577

secondary

#4740D0

accent

#03E30D

background

#FFFFFC

surface

#FFFEF6

border

#D7D6D0

text

#17170F

muted

#858580

Preview Lab

Preview with #EFF577

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

Preview Lab → · Contrast checker → · Palette generator →