#66CF3F#66CF3F

#66CF3F is a light, highly saturated green. Relative luminance 0.478; OKLCH L 76.3% C 0.204 H 138.6°. Best body text is #000000 at 10.56:1 contrast (WCAG AA passes).

Color values

HEX	#66CF3F
RGB	rgb(102, 207, 63)
HSL	hsl(104, 60%, 53%)
HSV	hsv(104, 70%, 81%)
CMYK	cmyk(50.7%, 0%, 69.6%, 18.8%)
CIE-LAB	lab(74.70, -55.56, 59.40)
CIE-LCH	lch(74.70, 81.33, 133.09°)
OKLab	oklab(76.34% -0.1532 0.1351)
OKLCH	oklch(76.34% 0.204 138.6)
XYZ	xyz(28.6885, 47.8072, 12.4176)
Luminance	0.4781 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CF3F #A83FCF

analogous

#AECF3F #66CF3F #3FCF60

triadic

#66CF3F #3F66CF #CF3F66

tetradic

#66CF3F #3FAECF #A83FCF #CF603F

square

#66CF3F #3FAECF #A83FCF #CF603F

split-complementary

#66CF3F #603FCF #CF3FAE

monochromatic

#36761E #4CA72A #66CF3F #8DDB70 #B4E7A1

Accessibility & contrast

On white

1.99

#66CF3F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.56

#66CF3F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CF3F

10.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CF3F	#FFFFFF	#000000	##000000
##66CF3F	1.00	1.99	10.56	10.56
#FFFFFF	1.99	1.00	21.00	21.00
#000000	10.56	21.00	1.00	1.00
##000000	10.56	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D5BD29

Deuteranopia (green-blind)

#C8B44D

Tritanopia (blue-blind)

#5DC8B2

Achromatopsia (no color)

#B8B8B8

Design tokens & code

CSS

--color: #66cf3f;
/* rgb */ color: rgb(102, 207, 63);
/* oklch */ color: oklch(76.3% 0.204 138.6);

Tailwind

colors: {
  custom: {
    50: '#9bde7c',
    500: '#66cf3f',
    950: '#000000',
  },
}

SCSS

$custom: #66cf3f;
$custom-light: #9bde7c;
$custom-dark: #000000;

JSON

{
  "hex": "#66cf3f",
  "rgb": {
    "r": 102,
    "g": 207,
    "b": 63
  },
  "hsl": {
    "h": 103.75,
    "s": 60,
    "l": 52.941
  },
  "oklch": {
    "l": 0.76341,
    "c": 0.20427,
    "h": 138.6
  },
  "luminance": 0.47809
}

Semantic roles & 50–950 ramp

primary

#66CF3F

secondary

#C396D4

accent

#45E3B8

background

#FAFDF7

surface

#F3FBEE

border

#CDD4C9

text

#0F150A

muted

#7F837C

Preview Lab

Preview with #66CF3F

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

Preview Lab → · Contrast checker → · Palette generator →