#66CF31#66CF31

#66CF31 is a light, highly saturated yellow-green. Relative luminance 0.477; OKLCH L 76.2% C 0.212 H 137.6°. Best body text is #000000 at 10.53:1 contrast (WCAG AA passes).

Color values

HEX	#66CF31
RGB	rgb(102, 207, 49)
HSL	hsl(100, 62%, 50%)
HSV	hsv(100, 76%, 81%)
CMYK	cmyk(50.7%, 0%, 76.3%, 18.8%)
CIE-LAB	lab(74.62, -56.53, 64.19)
CIE-LCH	lch(74.62, 85.54, 131.37°)
OKLab	oklab(76.24% -0.1567 0.1433)
OKLCH	oklch(76.24% 0.212 137.6)
XYZ	xyz(28.3458, 47.6701, 10.6127)
Luminance	0.4767 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CF31 #9A31CF

analogous

#B5CF31 #66CF31 #31CF4B

triadic

#66CF31 #3166CF #CF3166

tetradic

#66CF31 #31B5CF #9A31CF #CF4B31

square

#66CF31 #31B5CF #9A31CF #CF4B31

split-complementary

#66CF31 #4B31CF #CF31B5

monochromatic

#356C19 #4D9E25 #66CF31 #8BDB63 #B0E694

Accessibility & contrast

On white

1.99

#66CF31 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.53

#66CF31 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CF31

10.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CF31	#FFFFFF	#000000	##000000
##66CF31	1.00	1.99	10.53	10.53
#FFFFFF	1.99	1.00	21.00	21.00
#000000	10.53	21.00	1.00	1.00
##000000	10.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D6BD06

Deuteranopia (green-blind)

#C8B442

Tritanopia (blue-blind)

#5FC8B1

Achromatopsia (no color)

#B8B8B8

Design tokens & code

CSS

--color: #66cf31;
/* rgb */ color: rgb(102, 207, 49);
/* oklch */ color: oklch(76.2% 0.212 137.6);

Tailwind

colors: {
  custom: {
    50: '#9bde75',
    500: '#66cf31',
    950: '#000000',
  },
}

SCSS

$custom: #66cf31;
$custom-light: #9bde75;
$custom-dark: #000000;

JSON

{
  "hex": "#66cf31",
  "rgb": {
    "r": 102,
    "g": 207,
    "b": 49
  },
  "hsl": {
    "h": 99.873,
    "s": 62.205,
    "l": 50.196
  },
  "oklch": {
    "l": 0.76241,
    "c": 0.21229,
    "h": 137.6
  },
  "luminance": 0.47672
}

Semantic roles & 50–950 ramp

primary

#66CF31

secondary

#BA8BD1

accent

#43E5AF

background

#FAFDF7

surface

#F4FBED

border

#CED4C8

text

#0F1509

muted

#7F837B

Preview Lab

Preview with #66CF31

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

Preview Lab → · Contrast checker → · Palette generator →