#66CF39#66CF39

#66CF39 is a light, highly saturated green. Relative luminance 0.477; OKLCH L 76.3% C 0.208 H 138.1°. Best body text is #000000 at 10.55:1 contrast (WCAG AA passes).

Color values

HEX	#66CF39
RGB	rgb(102, 207, 57)
HSL	hsl(102, 61%, 52%)
HSV	hsv(102, 72%, 81%)
CMYK	cmyk(50.7%, 0%, 72.5%, 18.8%)
CIE-LAB	lab(74.66, -56.01, 61.55)
CIE-LCH	lch(74.66, 83.22, 132.30°)
OKLab	oklab(76.3% -0.1548 0.1389)
OKLCH	oklch(76.3% 0.208 138.1)
XYZ	xyz(28.5298, 47.7437, 11.5822)
Luminance	0.4775 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CF39 #A239CF

analogous

#B1CF39 #66CF39 #39CF57

triadic

#66CF39 #3966CF #CF3966

tetradic

#66CF39 #39B1CF #A239CF #CF5739

square

#66CF39 #39B1CF #A239CF #CF5739

split-complementary

#66CF39 #5739CF #CF39B1

monochromatic

#36721C #4DA328 #66CF39 #8CDB6A #B2E79C

Accessibility & contrast

On white

1.99

#66CF39 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.55

#66CF39 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CF39

10.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CF39	#FFFFFF	#000000	##000000
##66CF39	1.00	1.99	10.55	10.55
#FFFFFF	1.99	1.00	21.00	21.00
#000000	10.55	21.00	1.00	1.00
##000000	10.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D5BD1D

Deuteranopia (green-blind)

#C8B448

Tritanopia (blue-blind)

#5EC8B2

Achromatopsia (no color)

#B8B8B8

Design tokens & code

CSS

--color: #66cf39;
/* rgb */ color: rgb(102, 207, 57);
/* oklch */ color: oklch(76.3% 0.208 138.1);

Tailwind

colors: {
  custom: {
    50: '#9bde79',
    500: '#66cf39',
    950: '#000000',
  },
}

SCSS

$custom: #66cf39;
$custom-light: #9bde79;
$custom-dark: #000000;

JSON

{
  "hex": "#66cf39",
  "rgb": {
    "r": 102,
    "g": 207,
    "b": 57
  },
  "hsl": {
    "h": 102,
    "s": 60.976,
    "l": 51.765
  },
  "oklch": {
    "l": 0.76295,
    "c": 0.20793,
    "h": 138.1
  },
  "luminance": 0.47746
}

Semantic roles & 50–950 ramp

primary

#66CF39

secondary

#BF91D3

accent

#44E4B4

background

#FAFDF7

surface

#F4FBEE

border

#CED4C9

text

#0F150A

muted

#7F837C

Preview Lab

Preview with #66CF39

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

Preview Lab → · Contrast checker → · Palette generator →