#66CD3B#66CD3B

#66CD3B is a light, highly saturated green. Relative luminance 0.468; OKLCH L 75.8% C 0.204 H 138.2°. Best body text is #000000 at 10.36:1 contrast (WCAG AA passes).

Color values

HEX	#66CD3B
RGB	rgb(102, 205, 59)
HSL	hsl(102, 59%, 52%)
HSV	hsv(102, 71%, 80%)
CMYK	cmyk(50.2%, 0%, 71.2%, 19.6%)
CIE-LAB	lab(74.06, -55.11, 60.22)
CIE-LCH	lch(74.06, 81.64, 132.46°)
OKLab	oklab(75.81% -0.1522 0.1363)
OKLCH	oklch(75.81% 0.204 138.2)
XYZ	xyz(28.0992, 46.8011, 11.6897)
Luminance	0.4680 (WCAG relative)
Temperature	warm
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CD3B #A23BCD

analogous

#AFCD3B #66CD3B #3BCD59

triadic

#66CD3B #3B66CD #CD3B66

tetradic

#66CD3B #3BAFCD #A23BCD #CD593B

square

#66CD3B #3BAFCD #A23BCD #CD593B

split-complementary

#66CD3B #593BCD #CD3BAF

monochromatic

#36711D #4DA229 #66CD3B #8CD96C #B2E69D

Accessibility & contrast

On white

2.03

#66CD3B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.36

#66CD3B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CD3B

10.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CD3B	#FFFFFF	#000000	##000000
##66CD3B	1.00	2.03	10.36	10.36
#FFFFFF	2.03	1.00	21.00	21.00
#000000	10.36	21.00	1.00	1.00
##000000	10.36	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D3BB22

Deuteranopia (green-blind)

#C6B349

Tritanopia (blue-blind)

#5EC6B0

Achromatopsia (no color)

#B6B6B6

Design tokens & code

CSS

--color: #66cd3b;
/* rgb */ color: rgb(102, 205, 59);
/* oklch */ color: oklch(75.8% 0.204 138.2);

Tailwind

colors: {
  custom: {
    50: '#9bdd7a',
    500: '#66cd3b',
    950: '#000000',
  },
}

SCSS

$custom: #66cd3b;
$custom-light: #9bdd7a;
$custom-dark: #000000;

JSON

{
  "hex": "#66cd3b",
  "rgb": {
    "r": 102,
    "g": 205,
    "b": 59
  },
  "hsl": {
    "h": 102.329,
    "s": 59.35,
    "l": 51.765
  },
  "oklch": {
    "l": 0.75805,
    "c": 0.20436,
    "h": 138.2
  },
  "luminance": 0.46803
}

Semantic roles & 50–950 ramp

primary

#66CD3B

secondary

#BF92D2

accent

#45E3B4

background

#FAFDF7

surface

#F3FBEE

border

#CDD4C9

text

#0F150A

muted

#7F837C

Preview Lab

Preview with #66CD3B

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

Preview Lab → · Contrast checker → · Palette generator →