#66CB40#66CB40

#66CB40 is a light, vivid green. Relative luminance 0.459; OKLCH L 75.3% C 0.199 H 138.5°. Best body text is #000000 at 10.18:1 contrast (WCAG AA passes).

Color values

HEX	#66CB40
RGB	rgb(102, 203, 64)
HSL	hsl(104, 57%, 52%)
HSV	hsv(104, 68%, 80%)
CMYK	cmyk(49.8%, 0%, 68.5%, 20.4%)
CIE-LAB	lab(73.48, -53.97, 57.74)
CIE-LCH	lch(73.48, 79.03, 133.07°)
OKLab	oklab(75.34% -0.1488 0.1318)
OKLCH	oklch(75.34% 0.199 138.5)
XYZ	xyz(27.7598, 45.9048, 12.2472)
Luminance	0.4591 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CB40 #A540CB

analogous

#ACCB40 #66CB40 #40CB5F

triadic

#66CB40 #4066CB #CB4066

tetradic

#66CB40 #40ACCB #A540CB #CB5F40

square

#66CB40 #40ACCB #A540CB #CB5F40

split-complementary

#66CB40 #5F40CB #CB40AC

monochromatic

#36721F #4CA22C #66CB40 #8DD870 #B3E5A0

Accessibility & contrast

On white

2.06

#66CB40 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.18

#66CB40 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CB40

10.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CB40	#FFFFFF	#000000	##000000
##66CB40	1.00	2.06	10.18	10.18
#FFFFFF	2.06	1.00	21.00	21.00
#000000	10.18	21.00	1.00	1.00
##000000	10.18	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D1BA2C

Deuteranopia (green-blind)

#C4B14D

Tritanopia (blue-blind)

#5EC4AF

Achromatopsia (no color)

#B4B4B4

Design tokens & code

CSS

--color: #66cb40;
/* rgb */ color: rgb(102, 203, 64);
/* oklch */ color: oklch(75.3% 0.199 138.5);

Tailwind

colors: {
  custom: {
    50: '#9adc7c',
    500: '#66cb40',
    950: '#000000',
  },
}

SCSS

$custom: #66cb40;
$custom-light: #9adc7c;
$custom-dark: #000000;

JSON

{
  "hex": "#66cb40",
  "rgb": {
    "r": 102,
    "g": 203,
    "b": 64
  },
  "hsl": {
    "h": 103.597,
    "s": 57.202,
    "l": 52.353
  },
  "oklch": {
    "l": 0.7534,
    "c": 0.19877,
    "h": 138.5
  },
  "luminance": 0.45907
}

Semantic roles & 50–950 ramp

primary

#66CB40

secondary

#C195D2

accent

#47E0B7

background

#FAFDF7

surface

#F3FBEE

border

#CDD4C9

text

#0F150A

muted

#7F837C

Preview Lab

Preview with #66CB40

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

Preview Lab → · Contrast checker → · Palette generator →