#66EC5B#66EC5B

#66EC5B is a very light, highly saturated green. Relative luminance 0.636; OKLCH L 83.9% C 0.220 H 142.1°. Best body text is #000000 at 13.71:1 contrast (WCAG AA passes).

Color values

HEX#66EC5B
RGBrgb(102, 236, 91)
HSLhsl(115, 79%, 64%)
HSVhsv(115, 61%, 93%)
CMYKcmyk(56.8%, 0%, 61.4%, 7.5%)
CIE-LABlab(83.74, -63.65, 57.91)
CIE-LCHlch(83.74, 86.05, 137.70°)
OKLaboklab(83.86% -0.1735 0.1351)
OKLCHoklch(83.86% 0.22 142.1)
XYZxyz(37.3614, 63.5677, 20.1964)
Luminance0.6357 (WCAG relative)
Temperatureneutral
Familygreen

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66EC5B #E15BEC
analogous
#AFEC5B #66EC5B #5BEC99
triadic
#66EC5B #5B66EC #EC5B66
tetradic
#66EC5B #5BAFEC #E15BEC #EC995B
square
#66EC5B #5BAFEC #E15BEC #EC995B
split-complementary
#66EC5B #995BEC #EC5BAF
monochromatic
#22B715 #33E624 #66EC5B #99F292 #CCF9C9

Accessibility & contrast

On white

1.53
#66EC5B on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

13.71
#66EC5B on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66EC5B
13.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66EC5B#FFFFFF#000000##000000
##66EC5B1.001.5313.7113.71
#FFFFFF1.531.0021.0021.00
#00000013.7121.001.001.00
##00000013.7121.001.001.00

Color blindness preview

Protanopia (red-blind)
#F1D84A
Deuteranopia (green-blind)
#E0CC67
Tritanopia (blue-blind)
#52E5CD
Achromatopsia (no color)
#D1D1D1

Design tokens & code

CSS
--color: #66ec5b;
/* rgb */ color: rgb(102, 236, 91);
/* oklch */ color: oklch(83.9% 0.220 142.1);
Tailwind
colors: {
  custom: {
    50: '#9ef38e',
    500: '#66ec5b',
    950: '#000000',
  },
}
SCSS
$custom: #66ec5b;
$custom-light: #9ef38e;
$custom-dark: #000000;
JSON
{
  "hex": "#66ec5b",
  "rgb": {
    "r": 102,
    "g": 236,
    "b": 91
  },
  "hsl": {
    "h": 115.448,
    "s": 79.235,
    "l": 64.118
  },
  "oklch": {
    "l": 0.83857,
    "c": 0.21986,
    "h": 142.1
  },
  "luminance": 0.63571
}

Semantic roles & 50–950 ramp

primary
#66EC5B
secondary
#AD34B7
accent
#0ADCCC
background
#FCFFFC
surface
#F6FEF4
border
#D0D6CE
text
#10170D
muted
#80857F

Preview Lab

Preview with #66EC5B

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

Preview Lab → · Contrast checker → · Palette generator →

#66EC5B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva