#66D1FB#66D1FB

#66D1FB is a light, moderate cyan. Relative luminance 0.554; OKLCH L 81.3% C 0.115 H 226.5°. Best body text is #000000 at 12.08:1 contrast (WCAG AA passes).

Color values

HEX#66D1FB
RGBrgb(102, 209, 251)
HSLhsl(197, 95%, 69%)
HSVhsv(197, 59%, 98%)
CMYKcmyk(59.4%, 16.7%, 0%, 1.6%)
CIE-LABlab(79.26, -18.95, -29.85)
CIE-LCHlch(79.26, 35.36, 237.59°)
OKLaboklab(81.34% -0.0788 -0.0832)
OKLCHoklch(81.34% 0.115 226.5)
XYZxyz(45.6857, 55.3863, 99.5311)
Luminance0.5539 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66D1FB #FB9066
analogous
#66FBDB #66D1FB #6687FB
triadic
#66D1FB #FB66D1 #D1FB66
tetradic
#66D1FB #DB66FB #FB9066 #87FB66
square
#66D1FB #DB66FB #FB9066 #87FB66
split-complementary
#66D1FB #FB6687 #FBDB66
monochromatic
#06A3E1 #2ABFF9 #66D1FB #A2E3FD #DDF5FE

Accessibility & contrast

On white

1.74
#66D1FB on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

12.08
#66D1FB on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D1FB
12.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66D1FB#FFFFFF#000000##000000
##66D1FB1.001.7412.0812.08
#FFFFFF1.741.0021.0021.00
#00000012.0821.001.001.00
##00000012.0821.001.001.00

Color blindness preview

Protanopia (red-blind)
#BACDFD
Deuteranopia (green-blind)
#A5BDFB
Tritanopia (blue-blind)
#00DDDF
Achromatopsia (no color)
#C4C4C4

Design tokens & code

CSS
--color: #66d1fb;
/* rgb */ color: rgb(102, 209, 251);
/* oklch */ color: oklch(81.3% 0.115 226.5);
Tailwind
colors: {
  custom: {
    50: '#9edffc',
    500: '#66d1fb',
    950: '#000000',
  },
}
SCSS
$custom: #66d1fb;
$custom-light: #9edffc;
$custom-dark: #000000;
JSON
{
  "hex": "#66d1fb",
  "rgb": {
    "r": 102,
    "g": 209,
    "b": 251
  },
  "hsl": {
    "h": 196.913,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.81344,
    "c": 0.11463,
    "h": 226.5
  },
  "luminance": 0.55391
}

Semantic roles & 50–950 ramp

primary
#66D1FB
secondary
#D55F30
accent
#4100E6
background
#FCFEFF
surface
#F6FCFF
border
#D0D5D7
text
#101517
muted
#808485

Preview Lab

Preview with #66D1FB

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

Preview Lab → · Contrast checker → · Palette generator →

#66D1FB Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva