#66BCF5#66BCF5

#66BCF5 is a light, moderate cyan. Relative luminance 0.454; OKLCH L 76.4% C 0.117 H 239.8°. Best body text is #000000 at 10.08:1 contrast (WCAG AA passes).

Color values

HEX#66BCF5
RGBrgb(102, 188, 245)
HSLhsl(204, 88%, 68%)
HSVhsv(204, 58%, 96%)
CMYKcmyk(58.4%, 23.3%, 0%, 3.9%)
CIE-LABlab(73.14, -9.73, -36.08)
CIE-LCHlch(73.14, 37.37, 254.91°)
OKLaboklab(76.4% -0.0589 -0.1011)
OKLCHoklch(76.4% 0.117 239.8)
XYZxyz(39.9380, 45.3801, 93.0230)
Luminance0.4538 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66BCF5 #F59F66
analogous
#66F5E6 #66BCF5 #6674F5
triadic
#66BCF5 #F566BC #BCF566
tetradic
#66BCF5 #E666F5 #F59F66 #74F566
square
#66BCF5 #E666F5 #F59F66 #74F566
split-complementary
#66BCF5 #F56674 #F5E666
monochromatic
#0E84D3 #2DA3F1 #66BCF5 #9FD5F9 #D9EEFD

Accessibility & contrast

On white

2.08
#66BCF5 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

10.08
#66BCF5 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BCF5
10.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66BCF5#FFFFFF#000000##000000
##66BCF51.002.0810.0810.08
#FFFFFF2.081.0021.0021.00
#00000010.0821.001.001.00
##00000010.0821.001.001.00

Color blindness preview

Protanopia (red-blind)
#A2BCF8
Deuteranopia (green-blind)
#8FADF4
Tritanopia (blue-blind)
#00CACF
Achromatopsia (no color)
#B4B4B4

Design tokens & code

CSS
--color: #66bcf5;
/* rgb */ color: rgb(102, 188, 245);
/* oklch */ color: oklch(76.4% 0.117 239.8);
Tailwind
colors: {
  custom: {
    50: '#9cd0f8',
    500: '#66bcf5',
    950: '#000000',
  },
}
SCSS
$custom: #66bcf5;
$custom-light: #9cd0f8;
$custom-dark: #000000;
JSON
{
  "hex": "#66bcf5",
  "rgb": {
    "r": 102,
    "g": 188,
    "b": 245
  },
  "hsl": {
    "h": 203.916,
    "s": 87.73,
    "l": 68.039
  },
  "oklch": {
    "l": 0.76401,
    "c": 0.11701,
    "h": 239.8
  },
  "luminance": 0.45384
}

Semantic roles & 50–950 ramp

primary
#66BCF5
secondary
#F1D7C6
accent
#5C01E4
background
#FAFCFF
surface
#F4F9FF
border
#CED2D7
text
#0F1317
muted
#7F8285

Preview Lab

Preview with #66BCF5

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

Preview Lab → · Contrast checker → · Palette generator →

#66BCF5 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva