#66CF3B#66CF3B

#66CF3B is a light, highly saturated green. Relative luminance 0.478; OKLCH L 76.3% C 0.207 H 138.3°. Best body text is #000000 at 10.55:1 contrast (WCAG AA passes).

Color values

HEX	#66CF3B
RGB	rgb(102, 207, 59)
HSL	hsl(103, 61%, 52%)
HSV	hsv(103, 71%, 81%)
CMYK	cmyk(50.7%, 0%, 71.5%, 18.8%)
CIE-LAB	lab(74.68, -55.87, 60.85)
CIE-LCH	lch(74.68, 82.61, 132.56°)
OKLab	oklab(76.31% -0.1543 0.1376)
OKLCH	oklch(76.31% 0.207 138.3)
XYZ	xyz(28.5807, 47.7641, 11.8502)
Luminance	0.4777 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CF3B #A43BCF

analogous

#B0CF3B #66CF3B #3BCF5A

triadic

#66CF3B #3B66CF #CF3B66

tetradic

#66CF3B #3BB0CF #A43BCF #CF5A3B

square

#66CF3B #3BB0CF #A43BCF #CF5A3B

split-complementary

#66CF3B #5A3BCF #CF3BB0

monochromatic

#36731C #4CA528 #66CF3B #8CDB6C #B3E79D

Accessibility & contrast

On white

1.99

#66CF3B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.55

#66CF3B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CF3B

10.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CF3B	#FFFFFF	#000000	##000000
##66CF3B	1.00	1.99	10.55	10.55
#FFFFFF	1.99	1.00	21.00	21.00
#000000	10.55	21.00	1.00	1.00
##000000	10.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D5BD21

Deuteranopia (green-blind)

#C8B44A

Tritanopia (blue-blind)

#5EC8B2

Achromatopsia (no color)

#B8B8B8

Design tokens & code

CSS

--color: #66cf3b;
/* rgb */ color: rgb(102, 207, 59);
/* oklch */ color: oklch(76.3% 0.207 138.3);

Tailwind

colors: {
  custom: {
    50: '#9bde7a',
    500: '#66cf3b',
    950: '#000000',
  },
}

SCSS

$custom: #66cf3b;
$custom-light: #9bde7a;
$custom-dark: #000000;

JSON

{
  "hex": "#66cf3b",
  "rgb": {
    "r": 102,
    "g": 207,
    "b": 59
  },
  "hsl": {
    "h": 102.568,
    "s": 60.656,
    "l": 52.157
  },
  "oklch": {
    "l": 0.76309,
    "c": 0.20675,
    "h": 138.3
  },
  "luminance": 0.47766
}

Semantic roles & 50–950 ramp

primary

#66CF3B

secondary

#C093D3

accent

#44E4B5

background

#FAFDF7

surface

#F4FBEE

border

#CED4C9

text

#0F150A

muted

#7F837C

Preview Lab

Preview with #66CF3B

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

Preview Lab → · Contrast checker → · Palette generator →