#66CC40#66CC40

#66CC40 is a light, vivid green. Relative luminance 0.464; OKLCH L 75.6% C 0.200 H 138.5°. Best body text is #000000 at 10.28:1 contrast (WCAG AA passes).

Color values

HEX	#66CC40
RGB	rgb(102, 204, 64)
HSL	hsl(104, 58%, 53%)
HSV	hsv(104, 69%, 80%)
CMYK	cmyk(50%, 0%, 68.6%, 20%)
CIE-LAB	lab(73.79, -54.35, 58.06)
CIE-LCH	lch(73.79, 79.53, 133.11°)
OKLab	oklab(75.59% -0.1498 0.1325)
OKLCH	oklch(75.59% 0.2 138.5)
XYZ	xyz(27.9968, 46.3786, 12.3262)
Luminance	0.4638 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CC40 #A640CC

analogous

#ACCC40 #66CC40 #40CC60

triadic

#66CC40 #4066CC #CC4066

tetradic

#66CC40 #40ACCC #A640CC #CC6040

square

#66CC40 #40ACCC #A640CC #CC6040

split-complementary

#66CC40 #6040CC #CC40AC

monochromatic

#36731F #4CA32C #66CC40 #8DD970 #B3E6A1

Accessibility & contrast

On white

2.04

#66CC40 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.28

#66CC40 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CC40

10.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CC40	#FFFFFF	#000000	##000000
##66CC40	1.00	2.04	10.28	10.28
#FFFFFF	2.04	1.00	21.00	21.00
#000000	10.28	21.00	1.00	1.00
##000000	10.28	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D2BB2B

Deuteranopia (green-blind)

#C5B24D

Tritanopia (blue-blind)

#5EC5B0

Achromatopsia (no color)

#B5B5B5

Design tokens & code

CSS

--color: #66cc40;
/* rgb */ color: rgb(102, 204, 64);
/* oklch */ color: oklch(75.6% 0.200 138.5);

Tailwind

colors: {
  custom: {
    50: '#9adc7c',
    500: '#66cc40',
    950: '#000000',
  },
}

SCSS

$custom: #66cc40;
$custom-light: #9adc7c;
$custom-dark: #000000;

JSON

{
  "hex": "#66cc40",
  "rgb": {
    "r": 102,
    "g": 204,
    "b": 64
  },
  "hsl": {
    "h": 103.714,
    "s": 57.851,
    "l": 52.549
  },
  "oklch": {
    "l": 0.75592,
    "c": 0.19999,
    "h": 138.5
  },
  "luminance": 0.46381
}

Semantic roles & 50–950 ramp

primary

#66CC40

secondary

#C295D2

accent

#47E1B7

background

#FAFDF7

surface

#F3FBEE

border

#CDD4C9

text

#0F150A

muted

#7F837C

Preview Lab

Preview with #66CC40

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

Preview Lab → · Contrast checker → · Palette generator →