#66D591#66D591

#66D591 is a light, vivid green. Relative luminance 0.525; OKLCH L 79.0% C 0.142 H 154.5°. Best body text is #000000 at 11.49:1 contrast (WCAG AA passes).

Color values

HEX	#66D591
RGB	rgb(102, 213, 145)
HSL	hsl(143, 57%, 62%)
HSV	hsv(143, 52%, 84%)
CMYK	cmyk(52.1%, 0%, 31.9%, 16.5%)
CIE-LAB	lab(77.55, -46.98, 24.17)
CIE-LCH	lch(77.55, 52.83, 152.78°)
OKLab	oklab(79.01% -0.128 0.061)
OKLCH	oklch(79.01% 0.142 154.5)
XYZ	xyz(34.3820, 52.4547, 35.0955)
Luminance	0.5246 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D591 #D566AA

analogous

#73D566 #66D591 #66D5C8

triadic

#66D591 #9166D5 #D59166

tetradic

#66D591 #6673D5 #D566AA #D5C866

square

#66D591 #6673D5 #D566AA #D5C866

split-complementary

#66D591 #C866D5 #D56673

monochromatic

#299754 #37C76F #66D591 #96E2B4 #C6EFD6

Accessibility & contrast

On white

1.83

#66D591 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.49

#66D591 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D591

11.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D591	#FFFFFF	#000000	##000000
##66D591	1.00	1.83	11.49	11.49
#FFFFFF	1.83	1.00	21.00	21.00
#000000	11.49	21.00	1.00	1.00
##000000	11.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#D5C68D

Deuteranopia (green-blind)

#C5BB95

Tritanopia (blue-blind)

#48D3C3

Achromatopsia (no color)

#C0C0C0

Design tokens & code

CSS

--color: #66d591;
/* rgb */ color: rgb(102, 213, 145);
/* oklch */ color: oklch(79.0% 0.142 154.5);

Tailwind

colors: {
  custom: {
    50: '#99e2b1',
    500: '#66d591',
    950: '#000000',
  },
}

SCSS

$custom: #66d591;
$custom-light: #99e2b1;
$custom-dark: #000000;

JSON

{
  "hex": "#66d591",
  "rgb": {
    "r": 102,
    "g": 213,
    "b": 145
  },
  "hsl": {
    "h": 143.243,
    "s": 56.923,
    "l": 61.765
  },
  "oklch": {
    "l": 0.79012,
    "c": 0.1418,
    "h": 154.5
  },
  "luminance": 0.52458
}

Semantic roles & 50–950 ramp

primary

#66D591

secondary

#9C437A

accent

#2185C4

background

#FCFEFD

surface

#F5FCF7

border

#CFD5D0

text

#0E1510

muted

#7F8481

Preview Lab

Preview with #66D591

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

Preview Lab → · Contrast checker → · Palette generator →