#ECF583#ECF583

#ECF583 is a very light, vivid yellow. Relative luminance 0.848; OKLCH L 94.0% C 0.138 H 112.7°. Best body text is #000000 at 17.96:1 contrast (WCAG AA passes).

Color values

HEX	#ECF583
RGB	rgb(236, 245, 131)
HSL	hsl(65, 85%, 74%)
HSV	hsv(65, 47%, 96%)
CMYK	cmyk(3.7%, 0%, 46.5%, 3.9%)
CIE-LAB	lab(93.79, -18.82, 53.50)
CIE-LCH	lch(93.79, 56.72, 109.38°)
OKLab	oklab(93.99% -0.0535 0.1276)
OKLCH	oklch(93.99% 0.138 112.7)
XYZ	xyz(71.3423, 84.7776, 34.0738)
Luminance	0.8478 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF583 #8C83F5

analogous

#F5C583 #ECF583 #B3F583

triadic

#ECF583 #83ECF5 #F583EC

tetradic

#ECF583 #83F5C5 #8C83F5 #F583B3

square

#ECF583 #83F5C5 #8C83F5 #F583B3

split-complementary

#ECF583 #83B3F5 #C583F5

monochromatic

#DAEB13 #E3F04A #ECF583 #F5FABC #FBFDE3

Accessibility & contrast

On white

1.17

#ECF583 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.96

#ECF583 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF583

17.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF583	#FFFFFF	#000000	##000000
##ECF583	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)

#FFEC79

Deuteranopia (green-blind)

#FFEF89

Tritanopia (blue-blind)

#F8E9DA

Achromatopsia (no color)

#EDEDED

Design tokens & code

CSS

--color: #ecf583;
/* rgb */ color: rgb(236, 245, 131);
/* oklch */ color: oklch(94.0% 0.138 112.7);

Tailwind

colors: {
  custom: {
    50: '#f4f8a9',
    500: '#ecf583',
    950: '#000000',
  },
}

SCSS

$custom: #ecf583;
$custom-light: #f4f8a9;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf583",
  "rgb": {
    "r": 236,
    "g": 245,
    "b": 131
  },
  "hsl": {
    "h": 64.737,
    "s": 85.075,
    "l": 73.725
  },
  "oklch": {
    "l": 0.93988,
    "c": 0.13838,
    "h": 112.7
  },
  "luminance": 0.84776
}

Semantic roles & 50–950 ramp

primary

#ECF583

secondary

#554BD1

accent

#04E215

background

#FFFFFD

surface

#FFFEF7

border

#D7D6D0

text

#171710

muted

#858581

Preview Lab

Preview with #ECF583

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

Preview Lab → · Contrast checker → · Palette generator →