#66DA5B#66DA5B

#66DA5B is a light, vivid green. Relative luminance 0.537; OKLCH L 79.4% C 0.198 H 141.9°. Best body text is #000000 at 11.74:1 contrast (WCAG AA passes).

Color values

HEX	#66DA5B
RGB	rgb(102, 218, 91)
HSL	hsl(115, 63%, 61%)
HSV	hsv(115, 58%, 85%)
CMYK	cmyk(53.2%, 0%, 58.3%, 14.5%)
CIE-LAB	lab(78.30, -57.04, 51.70)
CIE-LCH	lch(78.30, 76.99, 137.81°)
OKLab	oklab(79.38% -0.1556 0.1218)
OKLCH	oklch(79.38% 0.198 141.9)
XYZ	xyz(32.4376, 53.7203, 18.5552)
Luminance	0.5372 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66DA5B #CF5BDA

analogous

#A5DA5B #66DA5B #5BDA8F

triadic

#66DA5B #5B66DA #DA5B66

tetradic

#66DA5B #5BA5DA #CF5BDA #DA8F5B

square

#66DA5B #5BA5DA #CF5BDA #DA8F5B

split-complementary

#66DA5B #8F5BDA #DA5BA5

monochromatic

#2D9822 #3BCA2E #66DA5B #95E58D #C3F1BF

Accessibility & contrast

On white

1.79

#66DA5B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.74

#66DA5B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66DA5B

11.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66DA5B	#FFFFFF	#000000	##000000
##66DA5B	1.00	1.79	11.74	11.74
#FFFFFF	1.79	1.00	21.00	21.00
#000000	11.74	21.00	1.00	1.00
##000000	11.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#DFC84E

Deuteranopia (green-blind)

#D0BE65

Tritanopia (blue-blind)

#57D4BE

Achromatopsia (no color)

#C2C2C2

Design tokens & code

CSS

--color: #66da5b;
/* rgb */ color: rgb(102, 218, 91);
/* oklch */ color: oklch(79.4% 0.198 141.9);

Tailwind

colors: {
  custom: {
    50: '#9be68d',
    500: '#66da5b',
    950: '#000000',
  },
}

SCSS

$custom: #66da5b;
$custom-light: #9be68d;
$custom-dark: #000000;

JSON

{
  "hex": "#66da5b",
  "rgb": {
    "r": 102,
    "g": 218,
    "b": 91
  },
  "hsl": {
    "h": 114.803,
    "s": 63.184,
    "l": 60.588
  },
  "oklch": {
    "l": 0.79376,
    "c": 0.19755,
    "h": 141.9
  },
  "luminance": 0.53723
}

Semantic roles & 50–950 ramp

primary

#66DA5B

secondary

#943D9D

accent

#1BCBBC

background

#FCFEFC

surface

#F5FCF4

border

#CFD5CE

text

#0F160C

muted

#80847F

Preview Lab

Preview with #66DA5B

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

Preview Lab → · Contrast checker → · Palette generator →