#66BF38#66BF38

#66BF38 is a light, vivid yellow-green. Relative luminance 0.404; OKLCH L 72.2% C 0.189 H 137.0°. Best body text is #000000 at 9.07:1 contrast (WCAG AA passes).

Color values

HEX#66BF38
RGBrgb(102, 191, 56)
HSLhsl(100, 55%, 48%)
HSVhsv(100, 71%, 75%)
CMYKcmyk(46.6%, 0%, 70.7%, 25.1%)
CIE-LABlab(69.73, -49.93, 56.91)
CIE-LCHlch(69.73, 75.71, 131.26°)
OKLaboklab(72.24% -0.1384 0.129)
OKLCHoklch(72.24% 0.189 137)
XYZxyz(24.8234, 40.3703, 10.2248)
Luminance0.4037 (WCAG relative)
Temperaturewarm
Familyyellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66BF38 #9138BF
analogous
#A9BF38 #66BF38 #38BF4E
triadic
#66BF38 #3866BF #BF3866
tetradic
#66BF38 #38A9BF #9138BF #BF4E38
square
#66BF38 #38A9BF #9138BF #BF4E38
split-complementary
#66BF38 #4E38BF #BF38A9
monochromatic
#33601C #4D902A #66BF38 #89D163 #ACDF92

Accessibility & contrast

On white

2.31
#66BF38 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.07
#66BF38 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BF38
9.07:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66BF38#FFFFFF#000000##000000
##66BF381.002.319.079.07
#FFFFFF2.311.0021.0021.00
#0000009.0721.001.001.00
##0000009.0721.001.001.00

Color blindness preview

Protanopia (red-blind)
#C5AF22
Deuteranopia (green-blind)
#BAA845
Tritanopia (blue-blind)
#61B8A4
Achromatopsia (no color)
#AAAAAA

Design tokens & code

CSS
--color: #66bf38;
/* rgb */ color: rgb(102, 191, 56);
/* oklch */ color: oklch(72.2% 0.189 137.0);
Tailwind
colors: {
  custom: {
    50: '#99d376',
    500: '#66bf38',
    950: '#000000',
  },
}
SCSS
$custom: #66bf38;
$custom-light: #99d376;
$custom-dark: #000000;
JSON
{
  "hex": "#66bf38",
  "rgb": {
    "r": 102,
    "g": 191,
    "b": 56
  },
  "hsl": {
    "h": 99.556,
    "s": 54.656,
    "l": 48.431
  },
  "oklch": {
    "l": 0.72239,
    "c": 0.18921,
    "h": 137
  },
  "luminance": 0.40372
}

Semantic roles & 50–950 ramp

primary
#66BF38
secondary
#B489CA
accent
#4ADEAC
background
#F9FDF7
surface
#F2FAED
border
#CCD3C8
text
#0F1409
muted
#7E837B

Preview Lab

Preview with #66BF38

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

Preview Lab → · Contrast checker → · Palette generator →

#66BF38 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva