#66D040#66D040

#66D040 is a light, highly saturated green. Relative luminance 0.483; OKLCH L 76.6% C 0.205 H 138.7°. Best body text is #000000 at 10.66:1 contrast (WCAG AA passes).

Color values

HEX	#66D040
RGB	rgb(102, 208, 64)
HSL	hsl(104, 61%, 53%)
HSV	hsv(104, 69%, 82%)
CMYK	cmyk(51%, 0%, 69.2%, 18.4%)
CIE-LAB	lab(75.02, -55.86, 59.34)
CIE-LCH	lch(75.02, 81.50, 133.27°)
OKLab	oklab(76.6% -0.1539 0.1351)
OKLCH	oklch(76.6% 0.205 138.7)
XYZ	xyz(28.9597, 48.3045, 12.6472)
Luminance	0.4831 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D040 #AA40D0

analogous

#AED040 #66D040 #40D062

triadic

#66D040 #4066D0 #D04066

tetradic

#66D040 #40AED0 #AA40D0 #D06240

square

#66D040 #40AED0 #AA40D0 #D06240

split-complementary

#66D040 #6240D0 #D040AE

monochromatic

#35781E #4BA92A #66D040 #8DDC71 #B5E8A2

Accessibility & contrast

On white

1.97

#66D040 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.66

#66D040 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D040

10.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D040	#FFFFFF	#000000	##000000
##66D040	1.00	1.97	10.66	10.66
#FFFFFF	1.97	1.00	21.00	21.00
#000000	10.66	21.00	1.00	1.00
##000000	10.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D6BE2A

Deuteranopia (green-blind)

#C8B54D

Tritanopia (blue-blind)

#5DC9B3

Achromatopsia (no color)

#B9B9B9

Design tokens & code

CSS

--color: #66d040;
/* rgb */ color: rgb(102, 208, 64);
/* oklch */ color: oklch(76.6% 0.205 138.7);

Tailwind

colors: {
  custom: {
    50: '#9bdf7c',
    500: '#66d040',
    950: '#000000',
  },
}

SCSS

$custom: #66d040;
$custom-light: #9bdf7c;
$custom-dark: #000000;

JSON

{
  "hex": "#66d040",
  "rgb": {
    "r": 102,
    "g": 208,
    "b": 64
  },
  "hsl": {
    "h": 104.167,
    "s": 60.504,
    "l": 53.333
  },
  "oklch": {
    "l": 0.76601,
    "c": 0.20484,
    "h": 138.7
  },
  "luminance": 0.48307
}

Semantic roles & 50–950 ramp

primary

#66D040

secondary

#C597D5

accent

#44E4BA

background

#FAFDF7

surface

#F4FBEE

border

#CED4C9

text

#0F150A

muted

#7F837C

Preview Lab

Preview with #66D040

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

Preview Lab → · Contrast checker → · Palette generator →