#66C337#66C337

#66C337 is a light, vivid yellow-green. Relative luminance 0.421; OKLCH L 73.2% C 0.195 H 137.2°. Best body text is #000000 at 9.43:1 contrast (WCAG AA passes).

Color values

HEX	#66C337
RGB	rgb(102, 195, 55)
HSL	hsl(100, 56%, 49%)
HSV	hsv(100, 72%, 76%)
CMYK	cmyk(47.7%, 0%, 71.8%, 23.5%)
CIE-LAB	lab(70.96, -51.57, 58.53)
CIE-LCH	lch(70.96, 78.01, 131.38°)
OKLab	oklab(73.25% -0.1429 0.1323)
OKLCH	oklch(73.25% 0.195 137.2)
XYZ	xyz(25.6834, 42.1291, 10.3921)
Luminance	0.4213 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C337 #9437C3

analogous

#ACC337 #66C337 #37C34E

triadic

#66C337 #3766C3 #C33766

tetradic

#66C337 #37ACC3 #9437C3 #C34E37

square

#66C337 #37ACC3 #9437C3 #C34E37

split-complementary

#66C337 #4E37C3 #C337AC

monochromatic

#34641C #4D932A #66C337 #89D364 #AEE194

Accessibility & contrast

On white

2.23

#66C337 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.43

#66C337 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C337

9.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C337	#FFFFFF	#000000	##000000
##66C337	1.00	2.23	9.43	9.43
#FFFFFF	2.23	1.00	21.00	21.00
#000000	9.43	21.00	1.00	1.00
##000000	9.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C9B31F

Deuteranopia (green-blind)

#BDAB45

Tritanopia (blue-blind)

#60BCA8

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #66c337;
/* rgb */ color: rgb(102, 195, 55);
/* oklch */ color: oklch(73.2% 0.195 137.2);

Tailwind

colors: {
  custom: {
    50: '#9ad676',
    500: '#66c337',
    950: '#000000',
  },
}

SCSS

$custom: #66c337;
$custom-light: #9ad676;
$custom-dark: #000000;

JSON

{
  "hex": "#66c337",
  "rgb": {
    "r": 102,
    "g": 195,
    "b": 55
  },
  "hsl": {
    "h": 99.857,
    "s": 56,
    "l": 49.02
  },
  "oklch": {
    "l": 0.73245,
    "c": 0.19473,
    "h": 137.2
  },
  "luminance": 0.42131
}

Semantic roles & 50–950 ramp

primary

#66C337

secondary

#B68ACC

accent

#49DFAD

background

#F9FDF7

surface

#F2FAED

border

#CCD3C8

text

#0F1409

muted

#7E837B

Preview Lab

Preview with #66C337

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

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