#66D340#66D340

#66D340 is a light, highly saturated green. Relative luminance 0.498; OKLCH L 77.4% C 0.208 H 138.9°. Best body text is #000000 at 10.96:1 contrast (WCAG AA passes).

Color values

HEX	#66D340
RGB	rgb(102, 211, 64)
HSL	hsl(104, 63%, 54%)
HSV	hsv(104, 70%, 83%)
CMYK	cmyk(51.7%, 0%, 69.7%, 17.3%)
CIE-LAB	lab(75.93, -56.98, 60.30)
CIE-LCH	lch(75.93, 82.96, 133.38°)
OKLab	oklab(77.36% -0.157 0.1371)
OKLCH	oklch(77.36% 0.208 138.9)
XYZ	xyz(29.6980, 49.7812, 12.8933)
Luminance	0.4978 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D340 #AD40D3

analogous

#B0D340 #66D340 #40D364

triadic

#66D340 #4066D3 #D34066

tetradic

#66D340 #40B0D3 #AD40D3 #D36440

square

#66D340 #40B0D3 #AD40D3 #D36440

split-complementary

#66D340 #6440D3 #D340B0

monochromatic

#357C1D #4BAE28 #66D340 #8EDE72 #B6EAA3

Accessibility & contrast

On white

1.92

#66D340 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.96

#66D340 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D340

10.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D340	#FFFFFF	#000000	##000000
##66D340	1.00	1.92	10.96	10.96
#FFFFFF	1.92	1.00	21.00	21.00
#000000	10.96	21.00	1.00	1.00
##000000	10.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D9C129

Deuteranopia (green-blind)

#CBB84E

Tritanopia (blue-blind)

#5CCCB6

Achromatopsia (no color)

#BBBBBB

Design tokens & code

CSS

--color: #66d340;
/* rgb */ color: rgb(102, 211, 64);
/* oklch */ color: oklch(77.4% 0.208 138.9);

Tailwind

colors: {
  custom: {
    50: '#9be17d',
    500: '#66d340',
    950: '#000000',
  },
}

SCSS

$custom: #66d340;
$custom-light: #9be17d;
$custom-dark: #000000;

JSON

{
  "hex": "#66d340",
  "rgb": {
    "r": 102,
    "g": 211,
    "b": 64
  },
  "hsl": {
    "h": 104.49,
    "s": 62.553,
    "l": 53.922
  },
  "oklch": {
    "l": 0.77357,
    "c": 0.20843,
    "h": 138.9
  },
  "luminance": 0.49783
}

Semantic roles & 50–950 ramp

primary

#66D340

secondary

#C798D7

accent

#42E6BB

background

#FAFDF7

surface

#F4FBEE

border

#CED4C9

text

#0F150A

muted

#7F837C

Preview Lab

Preview with #66D340

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

Preview Lab → · Contrast checker → · Palette generator →