#66BF31#66BF31

#66BF31 is a light, vivid yellow-green. Relative luminance 0.403; OKLCH L 72.2% C 0.193 H 136.5°. Best body text is #000000 at 9.06:1 contrast (WCAG AA passes).

Color values

HEX#66BF31
RGBrgb(102, 191, 49)
HSLhsl(98, 59%, 47%)
HSVhsv(98, 74%, 75%)
CMYKcmyk(46.6%, 0%, 74.3%, 25.1%)
CIE-LABlab(69.69, -50.42, 59.39)
CIE-LCHlch(69.69, 77.91, 130.33°)
OKLaboklab(72.19% -0.1402 0.1332)
OKLCHoklch(72.19% 0.193 136.5)
XYZxyz(24.6640, 40.3065, 9.3854)
Luminance0.4031 (WCAG relative)
Temperaturewarm
Familyyellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66BF31 #8A31BF
analogous
#ADBF31 #66BF31 #31BF43
triadic
#66BF31 #3166BF #BF3166
tetradic
#66BF31 #31ADBF #8A31BF #BF4331
square
#66BF31 #31ADBF #8A31BF #BF4331
split-complementary
#66BF31 #4331BF #BF31AD
monochromatic
#325E18 #4C8E25 #66BF31 #87D459 #AAE18A

Accessibility & contrast

On white

2.32
#66BF31 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.06
#66BF31 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BF31
9.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66BF31#FFFFFF#000000##000000
##66BF311.002.329.069.06
#FFFFFF2.321.0021.0021.00
#0000009.0621.001.001.00
##0000009.0621.001.001.00

Color blindness preview

Protanopia (red-blind)
#C6AF13
Deuteranopia (green-blind)
#BAA840
Tritanopia (blue-blind)
#62B8A4
Achromatopsia (no color)
#AAAAAA

Design tokens & code

CSS
--color: #66bf31;
/* rgb */ color: rgb(102, 191, 49);
/* oklch */ color: oklch(72.2% 0.193 136.5);
Tailwind
colors: {
  custom: {
    50: '#99d373',
    500: '#66bf31',
    950: '#000000',
  },
}
SCSS
$custom: #66bf31;
$custom-light: #99d373;
$custom-dark: #000000;
JSON
{
  "hex": "#66bf31",
  "rgb": {
    "r": 102,
    "g": 191,
    "b": 49
  },
  "hsl": {
    "h": 97.606,
    "s": 59.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.72187,
    "c": 0.19341,
    "h": 136.5
  },
  "luminance": 0.40308
}

Semantic roles & 50–950 ramp

primary
#66BF31
secondary
#AF81CB
accent
#45E2A8
background
#F9FDF7
surface
#F2FAED
border
#CCD3C8
text
#0F1409
muted
#7E837B

Preview Lab

Preview with #66BF31

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

Preview Lab → · Contrast checker → · Palette generator →

#66BF31 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva