#66D581#66D581

#66D581 is a light, vivid green. Relative luminance 0.520; OKLCH L 78.7% C 0.157 H 149.5°. Best body text is #000000 at 11.40:1 contrast (WCAG AA passes).

Color values

HEX	#66D581
RGB	rgb(102, 213, 129)
HSL	hsl(135, 57%, 62%)
HSV	hsv(135, 52%, 84%)
CMYK	cmyk(52.1%, 0%, 39.4%, 16.5%)
CIE-LAB	lab(77.28, -49.81, 32.07)
CIE-LCH	lch(77.28, 59.24, 147.22°)
OKLab	oklab(78.7% -0.1351 0.0796)
OKLCH	oklch(78.7% 0.157 149.5)
XYZ	xyz(33.2340, 51.9955, 29.0494)
Luminance	0.5200 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D581 #D566BA

analogous

#83D566 #66D581 #66D5B9

triadic

#66D581 #8166D5 #D58166

tetradic

#66D581 #6683D5 #D566BA #D5B966

square

#66D581 #6683D5 #D566BA #D5B966

split-complementary

#66D581 #B966D5 #D56683

monochromatic

#299744 #37C75A #66D581 #96E2A9 #C6EFD0

Accessibility & contrast

On white

1.84

#66D581 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.40

#66D581 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D581

11.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D581	#FFFFFF	#000000	##000000
##66D581	1.00	1.84	11.40	11.40
#FFFFFF	1.84	1.00	21.00	21.00
#000000	11.40	21.00	1.00	1.00
##000000	11.40	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D6C57B

Deuteranopia (green-blind)

#C7BB86

Tritanopia (blue-blind)

#4ED2C0

Achromatopsia (no color)

#BFBFBF

Design tokens & code

CSS

--color: #66d581;
/* rgb */ color: rgb(102, 213, 129);
/* oklch */ color: oklch(78.7% 0.157 149.5);

Tailwind

colors: {
  custom: {
    50: '#99e3a6',
    500: '#66d581',
    950: '#000000',
  },
}

SCSS

$custom: #66d581;
$custom-light: #99e3a6;
$custom-dark: #000000;

JSON

{
  "hex": "#66d581",
  "rgb": {
    "r": 102,
    "g": 213,
    "b": 129
  },
  "hsl": {
    "h": 134.595,
    "s": 56.923,
    "l": 61.765
  },
  "oklch": {
    "l": 0.78698,
    "c": 0.15681,
    "h": 149.5
  },
  "luminance": 0.51998
}

Semantic roles & 50–950 ramp

primary

#66D581

secondary

#9C4386

accent

#219DC4

background

#FCFEFC

surface

#F5FCF6

border

#CFD5D0

text

#0F150F

muted

#808480

Preview Lab

Preview with #66D581

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

Preview Lab → · Contrast checker → · Palette generator →