#66BC1C#66BC1C

#66BC1C is a light, vivid yellow-green. Relative luminance 0.389; OKLCH L 71.3% C 0.199 H 135.0°. Best body text is #000000 at 8.77:1 contrast (WCAG AA passes).

Color values

HEX#66BC1C
RGBrgb(102, 188, 28)
HSLhsl(92, 74%, 42%)
HSVhsv(92, 85%, 74%)
CMYKcmyk(45.7%, 0%, 85.1%, 26.3%)
CIE-LABlab(68.66, -50.33, 64.51)
CIE-LCHlch(68.66, 81.82, 127.96°)
OKLaboklab(71.31% -0.1411 0.141)
OKLCHoklch(71.31% 0.199 135)
XYZxyz(23.6718, 38.8736, 7.3544)
Luminance0.3887 (WCAG relative)
Temperaturewarm
Familyyellow-green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66BC1C #721CBC
analogous
#B6BC1C #66BC1C #1CBC22
triadic
#66BC1C #1C66BC #BC1C66
tetradic
#66BC1C #1CB6BC #721CBC #BC221C
square
#66BC1C #1CB6BC #721CBC #BC221C
split-complementary
#66BC1C #221CBC #BC1CB6
monochromatic
#2C510C #498714 #66BC1C #84E134 #A4E96A

Accessibility & contrast

On white

2.39
#66BC1C on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.77
#66BC1C on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BC1C
8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66BC1C#FFFFFF#000000##000000
##66BC1C1.002.398.778.77
#FFFFFF2.391.0021.0021.00
#0000008.7721.001.001.00
##0000008.7721.001.001.00

Color blindness preview

Protanopia (red-blind)
#C3AC00
Deuteranopia (green-blind)
#B8A531
Tritanopia (blue-blind)
#64B5A0
Achromatopsia (no color)
#A7A7A7

Design tokens & code

CSS
--color: #66bc1c;
/* rgb */ color: rgb(102, 188, 28);
/* oklch */ color: oklch(71.3% 0.199 135.0);
Tailwind
colors: {
  custom: {
    50: '#9ad16a',
    500: '#66bc1c',
    950: '#000000',
  },
}
SCSS
$custom: #66bc1c;
$custom-light: #9ad16a;
$custom-dark: #000000;
JSON
{
  "hex": "#66bc1c",
  "rgb": {
    "r": 102,
    "g": 188,
    "b": 28
  },
  "hsl": {
    "h": 92.25,
    "s": 74.074,
    "l": 42.353
  },
  "oklch": {
    "l": 0.71312,
    "c": 0.19948,
    "h": 135
  },
  "luminance": 0.38875
}

Semantic roles & 50–950 ramp

primary
#66BC1C
secondary
#9E65CE
accent
#37F19B
background
#FAFCF6
surface
#F3F9EC
border
#CDD2C7
text
#0F1407
muted
#7F827A

Preview Lab

Preview with #66BC1C

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

Preview Lab → · Contrast checker → · Palette generator →

#66BC1C Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva