#66C581#66C581

#66C581 is a light, vivid green. Relative luminance 0.443; OKLCH L 74.8% C 0.134 H 151.2°. Best body text is #000000 at 9.87:1 contrast (WCAG AA passes).

Color values

HEX	#66C581
RGB	rgb(102, 197, 129)
HSL	hsl(137, 45%, 59%)
HSV	hsv(137, 48%, 77%)
CMYK	cmyk(48.2%, 0%, 34.5%, 22.7%)
CIE-LAB	lab(72.46, -43.10, 25.67)
CIE-LCH	lch(72.46, 50.17, 149.22°)
OKLab	oklab(74.76% -0.1173 0.0644)
OKLCH	oklch(74.76% 0.134 151.2)
XYZ	xyz(29.4062, 44.3400, 27.7735)
Luminance	0.4434 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C581 #C566AA

analogous

#7AC566 #66C581 #66C5B0

triadic

#66C581 #8166C5 #C58166

tetradic

#66C581 #667AC5 #C566AA #C5B066

square

#66C581 #667AC5 #C566AA #C5B066

split-complementary

#66C581 #B066C5 #C5667A

monochromatic

#318047 #41AC60 #66C581 #92D6A6 #BFE7CA

Accessibility & contrast

On white

2.13

#66C581 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.87

#66C581 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C581

9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C581	#FFFFFF	#000000	##000000
##66C581	1.00	2.13	9.87	9.87
#FFFFFF	2.13	1.00	21.00	21.00
#000000	9.87	21.00	1.00	1.00
##000000	9.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C6B77D

Deuteranopia (green-blind)

#B8AE85

Tritanopia (blue-blind)

#52C2B3

Achromatopsia (no color)

#B2B2B2

Design tokens & code

CSS

--color: #66c581;
/* rgb */ color: rgb(102, 197, 129);
/* oklch */ color: oklch(74.8% 0.134 151.2);

Tailwind

colors: {
  custom: {
    50: '#97d7a6',
    500: '#66c581',
    950: '#000000',
  },
}

SCSS

$custom: #66c581;
$custom-light: #97d7a6;
$custom-dark: #000000;

JSON

{
  "hex": "#66c581",
  "rgb": {
    "r": 102,
    "g": 197,
    "b": 129
  },
  "hsl": {
    "h": 137.053,
    "s": 45.024,
    "l": 58.627
  },
  "oklch": {
    "l": 0.74757,
    "c": 0.13381,
    "h": 151.2
  },
  "luminance": 0.44342
}

Semantic roles & 50–950 ramp

primary

#66C581

secondary

#D6B1CC

accent

#53B0D5

background

#F9FDFA

surface

#F2FAF4

border

#CCD3CE

text

#0E140F

muted

#7E837F

Preview Lab

Preview with #66C581

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

Preview Lab → · Contrast checker → · Palette generator →