#66EF3C#66EF3C

#66EF3C is a very light, highly saturated green. Relative luminance 0.649; OKLCH L 84.3% C 0.243 H 139.6°. Best body text is #000000 at 13.98:1 contrast (WCAG AA passes).

Color values

HEX	#66EF3C
RGB	rgb(102, 239, 60)
HSL	hsl(106, 85%, 59%)
HSV	hsv(106, 75%, 94%)
CMYK	cmyk(57.3%, 0%, 74.9%, 6.3%)
CIE-LAB	lab(84.42, -67.25, 70.22)
CIE-LCH	lch(84.42, 97.23, 133.76°)
OKLab	oklab(84.35% -0.1849 0.1573)
OKLCH	oklch(84.35% 0.243 139.6)
XYZ	xyz(37.1600, 64.8808, 14.8391)
Luminance	0.6488 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66EF3C #C53CEF

analogous

#BFEF3C #66EF3C #3CEF6B

triadic

#66EF3C #3C66EF #EF3C66

tetradic

#66EF3C #3CBFEF #C53CEF #EF6B3C

square

#66EF3C #3CBFEF #C53CEF #EF6B3C

split-complementary

#66EF3C #6B3CEF #EF3CBF

monochromatic

#31A30D #41DC12 #66EF3C #92F475 #BFF8AD

Accessibility & contrast

On white

1.50

#66EF3C on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

13.98

#66EF3C on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66EF3C

13.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66EF3C	#FFFFFF	#000000	##000000
##66EF3C	1.00	1.50	13.98	13.98
#FFFFFF	1.50	1.00	21.00	21.00
#000000	13.98	21.00	1.00	1.00
##000000	13.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#F6DA11

Deuteranopia (green-blind)

#E5CE50

Tritanopia (blue-blind)

#56E7CD

Achromatopsia (no color)

#D3D3D3

Design tokens & code

CSS

--color: #66ef3c;
/* rgb */ color: rgb(102, 239, 60);
/* oklch */ color: oklch(84.3% 0.243 139.6);

Tailwind

colors: {
  custom: {
    50: '#9ff57e',
    500: '#66ef3c',
    950: '#000000',
  },
}

SCSS

$custom: #66ef3c;
$custom-light: #9ff57e;
$custom-dark: #000000;

JSON

{
  "hex": "#66ef3c",
  "rgb": {
    "r": 102,
    "g": 239,
    "b": 60
  },
  "hsl": {
    "h": 105.922,
    "s": 84.834,
    "l": 58.627
  },
  "oklch": {
    "l": 0.84349,
    "c": 0.24278,
    "h": 139.6
  },
  "luminance": 0.64884
}

Semantic roles & 50–950 ramp

primary

#66EF3C

secondary

#882AA5

accent

#2DFBCB

background

#FDFFFB

surface

#F7FFF2

border

#D0D7CC

text

#10170B

muted

#81857E

Preview Lab

Preview with #66EF3C

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

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