#66C831#66C831

#66C831 is a light, highly saturated yellow-green. Relative luminance 0.444; OKLCH L 74.5% C 0.204 H 137.1°. Best body text is #000000 at 9.87:1 contrast (WCAG AA passes).

Color values

HEX#66C831
RGBrgb(102, 200, 49)
HSLhsl(99, 61%, 49%)
HSVhsv(99, 76%, 78%)
CMYKcmyk(49%, 0%, 75.5%, 21.6%)
CIE-LABlab(72.46, -53.90, 62.11)
CIE-LCHlch(72.46, 82.24, 130.95°)
OKLaboklab(74.47% -0.1496 0.1389)
OKLCHoklch(74.47% 0.204 137.1)
XYZxyz(26.6873, 44.3532, 10.0599)
Luminance0.4435 (WCAG relative)
Temperaturewarm
Familyyellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66C831 #9331C8
analogous
#B2C831 #66C831 #31C847
triadic
#66C831 #3166C8 #C83166
tetradic
#66C831 #31B2C8 #9331C8 #C84731
square
#66C831 #31B2C8 #9331C8 #C84731
split-complementary
#66C831 #4731C8 #C831B2
monochromatic
#346619 #4D9725 #66C831 #89D85F #ADE490

Accessibility & contrast

On white

2.13
#66C831 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.87
#66C831 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C831
9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66C831#FFFFFF#000000##000000
##66C8311.002.139.879.87
#FFFFFF2.131.0021.0021.00
#0000009.8721.001.001.00
##0000009.8721.001.001.00

Color blindness preview

Protanopia (red-blind)
#CFB70D
Deuteranopia (green-blind)
#C2AF41
Tritanopia (blue-blind)
#60C1AB
Achromatopsia (no color)
#B2B2B2

Design tokens & code

CSS
--color: #66c831;
/* rgb */ color: rgb(102, 200, 49);
/* oklch */ color: oklch(74.5% 0.204 137.1);
Tailwind
colors: {
  custom: {
    50: '#9ad974',
    500: '#66c831',
    950: '#000000',
  },
}
SCSS
$custom: #66c831;
$custom-light: #9ad974;
$custom-dark: #000000;
JSON
{
  "hex": "#66c831",
  "rgb": {
    "r": 102,
    "g": 200,
    "b": 49
  },
  "hsl": {
    "h": 98.94,
    "s": 60.643,
    "l": 48.824
  },
  "oklch": {
    "l": 0.7447,
    "c": 0.20413,
    "h": 137.1
  },
  "luminance": 0.44355
}

Semantic roles & 50–950 ramp

primary
#66C831
secondary
#B586CE
accent
#44E4AC
background
#FAFDF7
surface
#F3FBED
border
#CDD4C8
text
#0F1509
muted
#7F837B

Preview Lab

Preview with #66C831

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

Preview Lab → · Contrast checker → · Palette generator →

#66C831 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva