#ECF181#ECF181

#ECF181 is a very light, vivid yellow. Relative luminance 0.823; OKLCH L 93.1% C 0.136 H 111.0°. Best body text is #000000 at 17.47:1 contrast (WCAG AA passes).

Color values

HEX	#ECF181
RGB	rgb(236, 241, 129)
HSL	hsl(63, 80%, 73%)
HSV	hsv(63, 46%, 95%)
CMYK	cmyk(2.1%, 0%, 46.5%, 5.5%)
CIE-LAB	lab(92.72, -17.06, 53.15)
CIE-LCH	lch(92.72, 55.82, 107.80°)
OKLab	oklab(93.13% -0.0487 0.1267)
OKLCH	oklch(93.13% 0.136 111)
XYZ	xyz(70.0111, 82.3298, 32.9678)
Luminance	0.8233 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF181 #8681F1

analogous

#F1BE81 #ECF181 #B4F181

triadic

#ECF181 #81ECF1 #F181EC

tetradic

#ECF181 #81F1BE #8681F1 #F181B4

square

#ECF181 #81F1BE #8681F1 #F181B4

split-complementary

#ECF181 #81B4F1 #BE81F1

monochromatic

#D6DF19 #E4EB4A #ECF181 #F4F7B8 #FBFCE3

Accessibility & contrast

On white

1.20

#ECF181 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.47

#ECF181 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF181

17.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF181	#FFFFFF	#000000	##000000
##ECF181	1.00	1.20	17.47	17.47
#FFFFFF	1.20	1.00	21.00	21.00
#000000	17.47	21.00	1.00	1.00
##000000	17.47	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE877

Deuteranopia (green-blind)

#FFEC87

Tritanopia (blue-blind)

#F9E5D7

Achromatopsia (no color)

#EAEAEA

Design tokens & code

CSS

--color: #ecf181;
/* rgb */ color: rgb(236, 241, 129);
/* oklch */ color: oklch(93.1% 0.136 111.0);

Tailwind

colors: {
  custom: {
    50: '#f4f5a8',
    500: '#ecf181',
    950: '#000000',
  },
}

SCSS

$custom: #ecf181;
$custom-light: #f4f5a8;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf181",
  "rgb": {
    "r": 236,
    "g": 241,
    "b": 129
  },
  "hsl": {
    "h": 62.679,
    "s": 80,
    "l": 72.549
  },
  "oklch": {
    "l": 0.9313,
    "c": 0.13572,
    "h": 111
  },
  "luminance": 0.82328
}

Semantic roles & 50–950 ramp

primary

#ECF181

secondary

#504ACC

accent

#09DC13

background

#FFFFFD

surface

#FFFEF7

border

#D7D6D0

text

#171710

muted

#858581

Preview Lab

Preview with #ECF181

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

Preview Lab → · Contrast checker → · Palette generator →