#66D3F8#66D3F8

#66D3F8 is a light, moderate cyan. Relative luminance 0.562; OKLCH L 81.7% C 0.112 H 223.1°. Best body text is #000000 at 12.24:1 contrast (WCAG AA passes).

Color values

HEX#66D3F8
RGBrgb(102, 211, 248)
HSLhsl(195, 91%, 69%)
HSVhsv(195, 59%, 97%)
CMYKcmyk(58.9%, 14.9%, 0%, 2.7%)
CIE-LABlab(79.72, -20.85, -27.56)
CIE-LCHlch(79.72, 34.55, 232.89°)
OKLaboklab(81.67% -0.082 -0.0767)
OKLCHoklch(81.67% 0.112 223.1)
XYZxyz(45.7104, 56.1861, 97.2248)
Luminance0.5619 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66D3F8 #F88B66
analogous
#66F8D4 #66D3F8 #668AF8
triadic
#66D3F8 #F866D3 #D3F866
tetradic
#66D3F8 #D466F8 #F88B66 #8AF866
square
#66D3F8 #D466F8 #F88B66 #8AF866
split-complementary
#66D3F8 #F8668A #F8D466
monochromatic
#0AA5DA #2BC2F5 #66D3F8 #A1E4FB #DBF5FD

Accessibility & contrast

On white

1.72
#66D3F8 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

12.24
#66D3F8 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D3F8
12.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66D3F8#FFFFFF#000000##000000
##66D3F81.001.7212.2412.24
#FFFFFF1.721.0021.0021.00
#00000012.2421.001.001.00
##00000012.2421.001.001.00

Color blindness preview

Protanopia (red-blind)
#BECEFA
Deuteranopia (green-blind)
#A9BFF8
Tritanopia (blue-blind)
#00DFDF
Achromatopsia (no color)
#C6C6C6

Design tokens & code

CSS
--color: #66d3f8;
/* rgb */ color: rgb(102, 211, 248);
/* oklch */ color: oklch(81.7% 0.112 223.1);
Tailwind
colors: {
  custom: {
    50: '#9ee0fa',
    500: '#66d3f8',
    950: '#000000',
  },
}
SCSS
$custom: #66d3f8;
$custom-light: #9ee0fa;
$custom-dark: #000000;
JSON
{
  "hex": "#66d3f8",
  "rgb": {
    "r": 102,
    "g": 211,
    "b": 248
  },
  "hsl": {
    "h": 195.205,
    "s": 91.25,
    "l": 68.627
  },
  "oklch": {
    "l": 0.81673,
    "c": 0.11227,
    "h": 223.1
  },
  "luminance": 0.56191
}

Semantic roles & 50–950 ramp

primary
#66D3F8
secondary
#D25931
accent
#3A00E6
background
#FCFEFF
surface
#F6FCFF
border
#D0D5D7
text
#0F1517
muted
#808485

Preview Lab

Preview with #66D3F8

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

Preview Lab → · Contrast checker → · Palette generator →

#66D3F8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva