#66C3EA#66C3EA

#66C3EA is a light, moderate cyan. Relative luminance 0.478; OKLCH L 77.5% C 0.104 H 227.8°. Best body text is #000000 at 10.56:1 contrast (WCAG AA passes).

Color values

HEX#66C3EA
RGBrgb(102, 195, 234)
HSLhsl(198, 76%, 66%)
HSVhsv(198, 56%, 92%)
CMYKcmyk(56.4%, 16.7%, 0%, 8.2%)
CIE-LABlab(74.69, -16.73, -27.75)
CIE-LCHlch(74.69, 32.40, 238.92°)
OKLaboklab(77.5% -0.0701 -0.0772)
OKLCHoklch(77.5% 0.104 227.8)
XYZxyz(39.8402, 47.7918, 84.9512)
Luminance0.4780 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66C3EA #EA8D66
analogous
#66EACF #66C3EA #6681EA
triadic
#66C3EA #EA66C3 #C3EA66
tetradic
#66C3EA #CF66EA #EA8D66 #81EA66
square
#66C3EA #CF66EA #EA8D66 #81EA66
split-complementary
#66C3EA #EA6681 #EACF66
monochromatic
#1A8CBC #30AEE3 #66C3EA #9CD8F1 #D2EDF9

Accessibility & contrast

On white

1.99
#66C3EA on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

10.56
#66C3EA on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C3EA
10.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66C3EA#FFFFFF#000000##000000
##66C3EA1.001.9910.5610.56
#FFFFFF1.991.0021.0021.00
#00000010.5621.001.001.00
##00000010.5621.001.001.00

Color blindness preview

Protanopia (red-blind)
#AFC0EC
Deuteranopia (green-blind)
#9CB2EA
Tritanopia (blue-blind)
#00CED0
Achromatopsia (no color)
#B8B8B8

Design tokens & code

CSS
--color: #66c3ea;
/* rgb */ color: rgb(102, 195, 234);
/* oklch */ color: oklch(77.5% 0.104 227.8);
Tailwind
colors: {
  custom: {
    50: '#9cd5f0',
    500: '#66c3ea',
    950: '#000000',
  },
}
SCSS
$custom: #66c3ea;
$custom-light: #9cd5f0;
$custom-dark: #000000;
JSON
{
  "hex": "#66c3ea",
  "rgb": {
    "r": 102,
    "g": 195,
    "b": 234
  },
  "hsl": {
    "h": 197.727,
    "s": 75.862,
    "l": 65.882
  },
  "oklch": {
    "l": 0.77496,
    "c": 0.10435,
    "h": 227.8
  },
  "luminance": 0.47796
}

Semantic roles & 50–950 ramp

primary
#66C3EA
secondary
#ECCDC0
accent
#490DD8
background
#FAFDFE
surface
#F4FAFD
border
#CED3D5
text
#0F1416
muted
#7F8384

Preview Lab

Preview with #66C3EA

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

Preview Lab → · Contrast checker → · Palette generator →

#66C3EA Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva