#ECFC66#ECFC66

#ECFC66 is a very light, vivid yellow. Relative luminance 0.884; OKLCH L 95.1% C 0.172 H 114.9°. Best body text is #000000 at 18.68:1 contrast (WCAG AA passes).

Color values

HEX	#ECFC66
RGB	rgb(236, 252, 102)
HSL	hsl(66, 96%, 69%)
HSV	hsv(66, 60%, 99%)
CMYK	cmyk(6.3%, 0%, 59.5%, 1.2%)
CIE-LAB	lab(95.33, -24.52, 68.11)
CIE-LCH	lch(95.33, 72.39, 109.80°)
OKLab	oklab(95.13% -0.0724 0.1563)
OKLCH	oklch(95.13% 0.172 114.9)
XYZ	xyz(71.8023, 88.4141, 25.8509)
Luminance	0.8841 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECFC66 #7666FC

analogous

#FCC166 #ECFC66 #A1FC66

triadic

#ECFC66 #66ECFC #FC66EC

tetradic

#ECFC66 #66FCC1 #7666FC #FC66A1

square

#ECFC66 #66FCC1 #7666FC #FC66A1

split-complementary

#ECFC66 #66A1FC #C166FC

monochromatic

#CBE304 #E5FB2A #ECFC66 #F3FDA2 #FBFEDE

Accessibility & contrast

On white

1.12

#ECFC66 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.68

#ECFC66 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECFC66

18.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECFC66	#FFFFFF	#000000	##000000
##ECFC66	1.00	1.12	18.68	18.68
#FFFFFF	1.12	1.00	21.00	21.00
#000000	18.68	21.00	1.00	1.00
##000000	18.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF054

Deuteranopia (green-blind)

#FFF370

Tritanopia (blue-blind)

#FAEFDC

Achromatopsia (no color)

#F2F2F2

Design tokens & code

CSS

--color: #ecfc66;
/* rgb */ color: rgb(236, 252, 102);
/* oklch */ color: oklch(95.1% 0.172 114.9);

Tailwind

colors: {
  custom: {
    50: '#f5fd97',
    500: '#ecfc66',
    950: '#000000',
  },
}

SCSS

$custom: #ecfc66;
$custom-light: #f5fd97;
$custom-dark: #000000;

JSON

{
  "hex": "#ecfc66",
  "rgb": {
    "r": 236,
    "g": 252,
    "b": 102
  },
  "hsl": {
    "h": 66.4,
    "s": 96.154,
    "l": 69.412
  },
  "oklch": {
    "l": 0.95132,
    "c": 0.17225,
    "h": 114.9
  },
  "luminance": 0.88413
}

Semantic roles & 50–950 ramp

primary

#ECFC66

secondary

#4130D6

accent

#00E618

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#17170E

muted

#85857F

Preview Lab

Preview with #ECFC66

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

Preview Lab → · Contrast checker → · Palette generator →