#66C831#66C831

#66C831 is a light, highly saturated yellow-green. Relative luminance 0.444; OKLCH L 74.5% C 0.204 H 137.1°. Best body text is #000000 at 9.87:1 contrast (WCAG AA passes).

Color values

HEX	#66C831
RGB	rgb(102, 200, 49)
HSL	hsl(99, 61%, 49%)
HSV	hsv(99, 76%, 78%)
CMYK	cmyk(49%, 0%, 75.5%, 21.6%)
CIE-LAB	lab(72.46, -53.90, 62.11)
CIE-LCH	lch(72.46, 82.24, 130.95°)
OKLab	oklab(74.47% -0.1496 0.1389)
OKLCH	oklch(74.47% 0.204 137.1)
XYZ	xyz(26.6873, 44.3532, 10.0599)
Luminance	0.4435 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C831 #9331C8

analogous

#B2C831 #66C831 #31C847

triadic

#66C831 #3166C8 #C83166

tetradic

#66C831 #31B2C8 #9331C8 #C84731

square

#66C831 #31B2C8 #9331C8 #C84731

split-complementary

#66C831 #4731C8 #C831B2

monochromatic

#346619 #4D9725 #66C831 #89D85F #ADE490

Accessibility & contrast

On white

2.13

#66C831 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.87

#66C831 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C831

9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C831	#FFFFFF	#000000	##000000
##66C831	1.00	2.13	9.87	9.87
#FFFFFF	2.13	1.00	21.00	21.00
#000000	9.87	21.00	1.00	1.00
##000000	9.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#CFB70D

Deuteranopia (green-blind)

#C2AF41

Tritanopia (blue-blind)

#60C1AB

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #66c831;
/* rgb */ color: rgb(102, 200, 49);
/* oklch */ color: oklch(74.5% 0.204 137.1);

Tailwind

colors: {
  custom: {
    50: '#9ad974',
    500: '#66c831',
    950: '#000000',
  },
}

SCSS

$custom: #66c831;
$custom-light: #9ad974;
$custom-dark: #000000;

JSON

{
  "hex": "#66c831",
  "rgb": {
    "r": 102,
    "g": 200,
    "b": 49
  },
  "hsl": {
    "h": 98.94,
    "s": 60.643,
    "l": 48.824
  },
  "oklch": {
    "l": 0.7447,
    "c": 0.20413,
    "h": 137.1
  },
  "luminance": 0.44355
}

Semantic roles & 50–950 ramp

primary

#66C831

secondary

#B586CE

accent

#44E4AC

background

#FAFDF7

surface

#F3FBED

border

#CDD4C8

text

#0F1509

muted

#7F837B

Preview Lab

Preview with #66C831

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

Preview Lab → · Contrast checker → · Palette generator →