#66C8F9#66C8F9

#66C8F9 is a light, moderate cyan. Relative luminance 0.510; OKLCH L 79.2% C 0.115 H 232.5°. Best body text is #000000 at 11.19:1 contrast (WCAG AA passes).

Color values

HEX#66C8F9
RGBrgb(102, 200, 249)
HSLhsl(200, 92%, 69%)
HSVhsv(200, 59%, 98%)
CMYKcmyk(59%, 19.7%, 0%, 2.4%)
CIE-LABlab(76.66, -14.89, -32.79)
CIE-LCHlch(76.66, 36.01, 245.58°)
OKLaboklab(79.25% -0.0702 -0.0916)
OKLCHoklch(79.25% 0.115 232.5)
XYZxyz(43.2261, 50.9687, 97.1641)
Luminance0.5097 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66C8F9 #F99766
analogous
#66F9E1 #66C8F9 #667FF9
triadic
#66C8F9 #F966C8 #C8F966
tetradic
#66C8F9 #E166F9 #F99766 #7FF966
square
#66C8F9 #E166F9 #F99766 #7FF966
split-complementary
#66C8F9 #F9667F #F9E166
monochromatic
#0996DC #2BB3F7 #66C8F9 #A1DDFB #DCF2FE

Accessibility & contrast

On white

1.88
#66C8F9 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

11.19
#66C8F9 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C8F9
11.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66C8F9#FFFFFF#000000##000000
##66C8F91.001.8811.1911.19
#FFFFFF1.881.0021.0021.00
#00000011.1921.001.001.00
##00000011.1921.001.001.00

Color blindness preview

Protanopia (red-blind)
#B0C6FB
Deuteranopia (green-blind)
#9BB6F8
Tritanopia (blue-blind)
#00D5D8
Achromatopsia (no color)
#BDBDBD

Design tokens & code

CSS
--color: #66c8f9;
/* rgb */ color: rgb(102, 200, 249);
/* oklch */ color: oklch(79.2% 0.115 232.5);
Tailwind
colors: {
  custom: {
    50: '#9dd8fb',
    500: '#66c8f9',
    950: '#000000',
  },
}
SCSS
$custom: #66c8f9;
$custom-light: #9dd8fb;
$custom-dark: #000000;
JSON
{
  "hex": "#66c8f9",
  "rgb": {
    "r": 102,
    "g": 200,
    "b": 249
  },
  "hsl": {
    "h": 200,
    "s": 92.453,
    "l": 68.824
  },
  "oklch": {
    "l": 0.79246,
    "c": 0.1154,
    "h": 232.5
  },
  "luminance": 0.50973
}

Semantic roles & 50–950 ramp

primary
#66C8F9
secondary
#D36730
accent
#4D00E6
background
#FCFEFF
surface
#F6FBFF
border
#D0D4D7
text
#0F1417
muted
#808385

Preview Lab

Preview with #66C8F9

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

Preview Lab → · Contrast checker → · Palette generator →

#66C8F9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva