#ECF581#ECF581

#ECF581 is a very light, vivid yellow. Relative luminance 0.847; OKLCH L 94.0% C 0.140 H 112.7°. Best body text is #000000 at 17.94:1 contrast (WCAG AA passes).

Color values

HEX	#ECF581
RGB	rgb(236, 245, 129)
HSL	hsl(65, 85%, 73%)
HSV	hsv(65, 47%, 96%)
CMYK	cmyk(3.7%, 0%, 47.3%, 3.9%)
CIE-LAB	lab(93.76, -19.00, 54.41)
CIE-LCH	lch(93.76, 57.63, 109.25°)
OKLab	oklab(93.96% -0.0542 0.1295)
OKLCH	oklch(93.96% 0.14 112.7)
XYZ	xyz(71.2081, 84.7239, 33.3668)
Luminance	0.8472 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF581 #8A81F5

analogous

#F5C481 #ECF581 #B2F581

triadic

#ECF581 #81ECF5 #F581EC

tetradic

#ECF581 #81F5C4 #8A81F5 #F581B2

square

#ECF581 #81F5C4 #8A81F5 #F581B2

split-complementary

#ECF581 #81B2F5 #C481F5

monochromatic

#D8E913 #E3F048 #ECF581 #F5F9BA #FBFDE3

Accessibility & contrast

On white

1.17

#ECF581 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.94

#ECF581 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF581

17.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF581	#FFFFFF	#000000	##000000
##ECF581	1.00	1.17	17.94	17.94
#FFFFFF	1.17	1.00	21.00	21.00
#000000	17.94	21.00	1.00	1.00
##000000	17.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEC77

Deuteranopia (green-blind)

#FFEF87

Tritanopia (blue-blind)

#F9E9DA

Achromatopsia (no color)

#EDEDED

Design tokens & code

CSS

--color: #ecf581;
/* rgb */ color: rgb(236, 245, 129);
/* oklch */ color: oklch(94.0% 0.140 112.7);

Tailwind

colors: {
  custom: {
    50: '#f4f8a8',
    500: '#ecf581',
    950: '#000000',
  },
}

SCSS

$custom: #ecf581;
$custom-light: #f4f8a8;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf581",
  "rgb": {
    "r": 236,
    "g": 245,
    "b": 129
  },
  "hsl": {
    "h": 64.655,
    "s": 85.294,
    "l": 73.333
  },
  "oklch": {
    "l": 0.93962,
    "c": 0.14035,
    "h": 112.7
  },
  "luminance": 0.84723
}

Semantic roles & 50–950 ramp

primary

#ECF581

secondary

#5449D1

accent

#04E215

background

#FFFFFD

surface

#FFFEF7

border

#D7D6D0

text

#171710

muted

#858581

Preview Lab

Preview with #ECF581

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

Preview Lab → · Contrast checker → · Palette generator →