#66C0FB#66C0FB

#66C0FB is a light, vivid cyan. Relative luminance 0.475; OKLCH L 77.6% C 0.121 H 239.6°. Best body text is #000000 at 10.50:1 contrast (WCAG AA passes).

Color values

HEX#66C0FB
RGBrgb(102, 192, 251)
HSLhsl(204, 95%, 69%)
HSVhsv(204, 59%, 98%)
CMYKcmyk(59.4%, 23.5%, 0%, 1.6%)
CIE-LABlab(74.50, -10.05, -37.21)
CIE-LCHlch(74.50, 38.54, 254.89°)
OKLaboklab(77.56% -0.0612 -0.1043)
OKLCHoklch(77.56% 0.121 239.6)
XYZxyz(41.7352, 47.4851, 98.2142)
Luminance0.4749 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66C0FB #FBA166
analogous
#66FBEB #66C0FB #6676FB
triadic
#66C0FB #FB66C0 #C0FB66
tetradic
#66C0FB #EB66FB #FBA166 #76FB66
square
#66C0FB #EB66FB #FBA166 #76FB66
split-complementary
#66C0FB #FB6676 #FBEB66
monochromatic
#068AE1 #2AA7F9 #66C0FB #A2D9FD #DDF1FE

Accessibility & contrast

On white

2.00
#66C0FB on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

10.50
#66C0FB on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C0FB
10.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66C0FB#FFFFFF#000000##000000
##66C0FB1.002.0010.5010.50
#FFFFFF2.001.0021.0021.00
#00000010.5021.001.001.00
##00000010.5021.001.001.00

Color blindness preview

Protanopia (red-blind)
#A5C0FE
Deuteranopia (green-blind)
#91B1FA
Tritanopia (blue-blind)
#00CFD4
Achromatopsia (no color)
#B7B7B7

Design tokens & code

CSS
--color: #66c0fb;
/* rgb */ color: rgb(102, 192, 251);
/* oklch */ color: oklch(77.6% 0.121 239.6);
Tailwind
colors: {
  custom: {
    50: '#9dd2fd',
    500: '#66c0fb',
    950: '#000000',
  },
}
SCSS
$custom: #66c0fb;
$custom-light: #9dd2fd;
$custom-dark: #000000;
JSON
{
  "hex": "#66c0fb",
  "rgb": {
    "r": 102,
    "g": 192,
    "b": 251
  },
  "hsl": {
    "h": 203.758,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.77556,
    "c": 0.12093,
    "h": 239.6
  },
  "luminance": 0.47489
}

Semantic roles & 50–950 ramp

primary
#66C0FB
secondary
#F4DAC9
accent
#5B00E6
background
#FAFCFF
surface
#F4F9FF
border
#CED2D7
text
#0F1417
muted
#7F8285

Preview Lab

Preview with #66C0FB

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

Preview Lab → · Contrast checker → · Palette generator →

#66C0FB Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva