#66BBF5#66BBF5

#66BBF5 is a light, moderate cyan. Relative luminance 0.450; OKLCH L 76.2% C 0.118 H 240.5°. Best body text is #000000 at 9.99:1 contrast (WCAG AA passes).

Color values

HEX#66BBF5
RGBrgb(102, 187, 245)
HSLhsl(204, 88%, 68%)
HSVhsv(204, 58%, 96%)
CMYKcmyk(58.4%, 23.7%, 0%, 3.9%)
CIE-LABlab(72.86, -9.19, -36.52)
CIE-LCHlch(72.86, 37.66, 255.87°)
OKLaboklab(76.18% -0.0578 -0.1023)
OKLCHoklch(76.18% 0.118 240.5)
XYZxyz(39.7251, 44.9543, 92.9521)
Luminance0.4496 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66BBF5 #F5A066
analogous
#66F5E8 #66BBF5 #6673F5
triadic
#66BBF5 #F566BB #BBF566
tetradic
#66BBF5 #E866F5 #F5A066 #73F566
square
#66BBF5 #E866F5 #F5A066 #73F566
split-complementary
#66BBF5 #F56673 #F5E866
monochromatic
#0E83D3 #2DA1F1 #66BBF5 #9FD5F9 #D9EEFD

Accessibility & contrast

On white

2.10
#66BBF5 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

9.99
#66BBF5 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BBF5
9.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66BBF5#FFFFFF#000000##000000
##66BBF51.002.109.999.99
#FFFFFF2.101.0021.0021.00
#0000009.9921.001.001.00
##0000009.9921.001.001.00

Color blindness preview

Protanopia (red-blind)
#A1BBF8
Deuteranopia (green-blind)
#8DACF4
Tritanopia (blue-blind)
#00C9CF
Achromatopsia (no color)
#B3B3B3

Design tokens & code

CSS
--color: #66bbf5;
/* rgb */ color: rgb(102, 187, 245);
/* oklch */ color: oklch(76.2% 0.118 240.5);
Tailwind
colors: {
  custom: {
    50: '#9ccff8',
    500: '#66bbf5',
    950: '#000000',
  },
}
SCSS
$custom: #66bbf5;
$custom-light: #9ccff8;
$custom-dark: #000000;
JSON
{
  "hex": "#66bbf5",
  "rgb": {
    "r": 102,
    "g": 187,
    "b": 245
  },
  "hsl": {
    "h": 204.336,
    "s": 87.73,
    "l": 68.039
  },
  "oklch": {
    "l": 0.7618,
    "c": 0.11757,
    "h": 240.5
  },
  "luminance": 0.44958
}

Semantic roles & 50–950 ramp

primary
#66BBF5
secondary
#F1D7C6
accent
#5D01E4
background
#FAFCFF
surface
#F4F9FF
border
#CED2D7
text
#0F1317
muted
#7F8285

Preview Lab

Preview with #66BBF5

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

Preview Lab → · Contrast checker → · Palette generator →

#66BBF5 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva