#66CC31#66CC31

#66CC31 is a light, highly saturated yellow-green. Relative luminance 0.462; OKLCH L 75.5% C 0.209 H 137.4°. Best body text is #000000 at 10.25:1 contrast (WCAG AA passes).

Color values

HEX#66CC31
RGBrgb(102, 204, 49)
HSLhsl(99, 61%, 50%)
HSVhsv(99, 76%, 80%)
CMYKcmyk(50%, 0%, 76%, 20%)
CIE-LABlab(73.69, -55.41, 63.30)
CIE-LCHlch(73.69, 84.13, 131.20°)
OKLaboklab(75.48% -0.1536 0.1414)
OKLCHoklch(75.48% 0.209 137.4)
XYZxyz(27.6258, 46.2303, 10.3727)
Luminance0.4623 (WCAG relative)
Temperaturewarm
Familyyellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66CC31 #9731CC
analogous
#B4CC31 #66CC31 #31CC4A
triadic
#66CC31 #3166CC #CC3166
tetradic
#66CC31 #31B4CC #9731CC #CC4A31
square
#66CC31 #31B4CC #9731CC #CC4A31
split-complementary
#66CC31 #4A31CC #CC31B4
monochromatic
#356919 #4D9B25 #66CC31 #8AD961 #AFE592

Accessibility & contrast

On white

2.05
#66CC31 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

10.25
#66CC31 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CC31
10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66CC31#FFFFFF#000000##000000
##66CC311.002.0510.2510.25
#FFFFFF2.051.0021.0021.00
#00000010.2521.001.001.00
##00000010.2521.001.001.00

Color blindness preview

Protanopia (red-blind)
#D3BA09
Deuteranopia (green-blind)
#C5B242
Tritanopia (blue-blind)
#5FC5AF
Achromatopsia (no color)
#B5B5B5

Design tokens & code

CSS
--color: #66cc31;
/* rgb */ color: rgb(102, 204, 49);
/* oklch */ color: oklch(75.5% 0.209 137.4);
Tailwind
colors: {
  custom: {
    50: '#9bdc74',
    500: '#66cc31',
    950: '#000000',
  },
}
SCSS
$custom: #66cc31;
$custom-light: #9bdc74;
$custom-dark: #000000;
JSON
{
  "hex": "#66cc31",
  "rgb": {
    "r": 102,
    "g": 204,
    "b": 49
  },
  "hsl": {
    "h": 99.484,
    "s": 61.265,
    "l": 49.608
  },
  "oklch": {
    "l": 0.75483,
    "c": 0.2088,
    "h": 137.4
  },
  "luminance": 0.46232
}

Semantic roles & 50–950 ramp

primary
#66CC31
secondary
#B889D0
accent
#43E4AD
background
#FAFDF7
surface
#F4FBED
border
#CED4C8
text
#0F1509
muted
#7F837B

Preview Lab

Preview with #66CC31

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

Preview Lab → · Contrast checker → · Palette generator →

#66CC31 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva