#66C137#66C137

#66C137 is a light, vivid yellow-green. Relative luminance 0.412; OKLCH L 72.7% C 0.192 H 137.1°. Best body text is #000000 at 9.25:1 contrast (WCAG AA passes).

Color values

HEX#66C137
RGBrgb(102, 193, 55)
HSLhsl(100, 56%, 49%)
HSVhsv(100, 72%, 76%)
CMYKcmyk(47.2%, 0%, 71.5%, 24.3%)
CIE-LABlab(70.34, -50.79, 57.90)
CIE-LCHlch(70.34, 77.03, 131.26°)
OKLaboklab(72.74% -0.1408 0.131)
OKLCHoklch(72.74% 0.192 137.1)
XYZxyz(25.2383, 41.2389, 10.2437)
Luminance0.4124 (WCAG relative)
Temperaturewarm
Familyyellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66C137 #9237C1
analogous
#ABC137 #66C137 #37C14D
triadic
#66C137 #3766C1 #C13766
tetradic
#66C137 #37ABC1 #9237C1 #C14D37
square
#66C137 #37ABC1 #9237C1 #C14D37
split-complementary
#66C137 #4D37C1 #C137AB
monochromatic
#34621C #4D9129 #66C137 #89D263 #ADE092

Accessibility & contrast

On white

2.27
#66C137 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.25
#66C137 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C137
9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66C137#FFFFFF#000000##000000
##66C1371.002.279.259.25
#FFFFFF2.271.0021.0021.00
#0000009.2521.001.001.00
##0000009.2521.001.001.00

Color blindness preview

Protanopia (red-blind)
#C7B11F
Deuteranopia (green-blind)
#BBA944
Tritanopia (blue-blind)
#61BAA6
Achromatopsia (no color)
#ACACAC

Design tokens & code

CSS
--color: #66c137;
/* rgb */ color: rgb(102, 193, 55);
/* oklch */ color: oklch(72.7% 0.192 137.1);
Tailwind
colors: {
  custom: {
    50: '#99d476',
    500: '#66c137',
    950: '#000000',
  },
}
SCSS
$custom: #66c137;
$custom-light: #99d476;
$custom-dark: #000000;
JSON
{
  "hex": "#66c137",
  "rgb": {
    "r": 102,
    "g": 193,
    "b": 55
  },
  "hsl": {
    "h": 99.565,
    "s": 55.645,
    "l": 48.627
  },
  "oklch": {
    "l": 0.72738,
    "c": 0.1923,
    "h": 137.1
  },
  "luminance": 0.41241
}

Semantic roles & 50–950 ramp

primary
#66C137
secondary
#B489CB
accent
#49DFAC
background
#F9FDF7
surface
#F2FAED
border
#CCD3C8
text
#0F1409
muted
#7E837B

Preview Lab

Preview with #66C137

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

Preview Lab → · Contrast checker → · Palette generator →

#66C137 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva