#66C9FB#66C9FB

#66C9FB is a light, moderate cyan. Relative luminance 0.516; OKLCH L 79.6% C 0.117 H 232.9°. Best body text is #000000 at 11.31:1 contrast (WCAG AA passes).

Color values

HEX#66C9FB
RGBrgb(102, 201, 251)
HSLhsl(200, 95%, 69%)
HSVhsv(200, 59%, 98%)
CMYKcmyk(59.4%, 19.9%, 0%, 1.6%)
CIE-LABlab(77.02, -14.81, -33.31)
CIE-LCHlch(77.02, 36.46, 246.03°)
OKLaboklab(79.55% -0.0705 -0.0931)
OKLCHoklch(79.55% 0.117 232.9)
XYZxyz(43.7720, 51.5589, 98.8932)
Luminance0.5156 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66C9FB #FB9866
analogous
#66FBE2 #66C9FB #667FFB
triadic
#66C9FB #FB66C9 #C9FB66
tetradic
#66C9FB #E266FB #FB9866 #7FFB66
square
#66C9FB #E266FB #FB9866 #7FFB66
split-complementary
#66C9FB #FB667F #FBE266
monochromatic
#0697E1 #2AB4F9 #66C9FB #A2DEFD #DDF3FE

Accessibility & contrast

On white

1.86
#66C9FB on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

11.31
#66C9FB on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C9FB
11.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66C9FB#FFFFFF#000000##000000
##66C9FB1.001.8611.3111.31
#FFFFFF1.861.0021.0021.00
#00000011.3121.001.001.00
##00000011.3121.001.001.00

Color blindness preview

Protanopia (red-blind)
#B1C7FD
Deuteranopia (green-blind)
#9CB7FA
Tritanopia (blue-blind)
#00D6DA
Achromatopsia (no color)
#BEBEBE

Design tokens & code

CSS
--color: #66c9fb;
/* rgb */ color: rgb(102, 201, 251);
/* oklch */ color: oklch(79.6% 0.117 232.9);
Tailwind
colors: {
  custom: {
    50: '#9dd9fc',
    500: '#66c9fb',
    950: '#000000',
  },
}
SCSS
$custom: #66c9fb;
$custom-light: #9dd9fc;
$custom-dark: #000000;
JSON
{
  "hex": "#66c9fb",
  "rgb": {
    "r": 102,
    "g": 201,
    "b": 251
  },
  "hsl": {
    "h": 200.134,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.79554,
    "c": 0.1168,
    "h": 232.9
  },
  "luminance": 0.51563
}

Semantic roles & 50–950 ramp

primary
#66C9FB
secondary
#D56730
accent
#4D00E6
background
#FCFEFF
surface
#F6FBFF
border
#D0D4D7
text
#0F1417
muted
#808385

Preview Lab

Preview with #66C9FB

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

Preview Lab → · Contrast checker → · Palette generator →

#66C9FB Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva