#66BDF5#66BDF5

#66BDF5 is a light, moderate cyan. Relative luminance 0.458; OKLCH L 76.6% C 0.116 H 239.0°. Best body text is #000000 at 10.16:1 contrast (WCAG AA passes).

Color values

HEX#66BDF5
RGBrgb(102, 189, 245)
HSLhsl(203, 88%, 68%)
HSVhsv(203, 58%, 96%)
CMYKcmyk(58.4%, 22.9%, 0%, 3.9%)
CIE-LABlab(73.42, -10.27, -35.65)
CIE-LCHlch(73.42, 37.10, 253.93°)
OKLaboklab(76.62% -0.06 -0.0998)
OKLCHoklch(76.62% 0.116 239)
XYZxyz(40.1523, 45.8088, 93.0945)
Luminance0.4581 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66BDF5 #F59E66
analogous
#66F5E6 #66BDF5 #6675F5
triadic
#66BDF5 #F566BD #BDF566
tetradic
#66BDF5 #E666F5 #F59E66 #75F566
square
#66BDF5 #E666F5 #F59E66 #75F566
split-complementary
#66BDF5 #F56675 #F5E666
monochromatic
#0E86D3 #2DA4F1 #66BDF5 #9FD6F9 #D9EFFD

Accessibility & contrast

On white

2.07
#66BDF5 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

10.16
#66BDF5 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BDF5
10.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66BDF5#FFFFFF#000000##000000
##66BDF51.002.0710.1610.16
#FFFFFF2.071.0021.0021.00
#00000010.1621.001.001.00
##00000010.1621.001.001.00

Color blindness preview

Protanopia (red-blind)
#A4BDF8
Deuteranopia (green-blind)
#90AEF4
Tritanopia (blue-blind)
#00CBD0
Achromatopsia (no color)
#B4B4B4

Design tokens & code

CSS
--color: #66bdf5;
/* rgb */ color: rgb(102, 189, 245);
/* oklch */ color: oklch(76.6% 0.116 239.0);
Tailwind
colors: {
  custom: {
    50: '#9cd0f8',
    500: '#66bdf5',
    950: '#000000',
  },
}
SCSS
$custom: #66bdf5;
$custom-light: #9cd0f8;
$custom-dark: #000000;
JSON
{
  "hex": "#66bdf5",
  "rgb": {
    "r": 102,
    "g": 189,
    "b": 245
  },
  "hsl": {
    "h": 203.497,
    "s": 87.73,
    "l": 68.039
  },
  "oklch": {
    "l": 0.76623,
    "c": 0.11647,
    "h": 239
  },
  "luminance": 0.45813
}

Semantic roles & 50–950 ramp

primary
#66BDF5
secondary
#F1D7C6
accent
#5A01E4
background
#FAFCFF
surface
#F4F9FF
border
#CED2D7
text
#0F1417
muted
#7F8285

Preview Lab

Preview with #66BDF5

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

Preview Lab → · Contrast checker → · Palette generator →

#66BDF5 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva