#66A5EA#66A5EA

#66A5EA is a light, vivid cyan. Relative luminance 0.357; OKLCH L 70.8% C 0.121 H 251.9°. Best body text is #000000 at 8.14:1 contrast (WCAG AA passes).

Color values

HEX#66A5EA
RGBrgb(102, 165, 234)
HSLhsl(211, 76%, 66%)
HSVhsv(211, 56%, 92%)
CMYKcmyk(56.4%, 29.5%, 0%, 8.2%)
CIE-LABlab(66.27, -0.44, -40.81)
CIE-LCHlch(66.27, 40.81, 269.39°)
OKLaboklab(70.83% -0.0376 -0.1149)
OKLCHoklch(70.83% 0.121 251.9)
XYZxyz(33.7806, 35.6727, 82.9313)
Luminance0.3568 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66A5EA #EAAB66
analogous
#66E7EA #66A5EA #6966EA
triadic
#66A5EA #EA66A5 #A5EA66
tetradic
#66A5EA #EA66E7 #EAAB66 #66EA69
square
#66A5EA #EA66E7 #EAAB66 #66EA69
split-complementary
#66A5EA #EA6966 #E7EA66
monochromatic
#1A67BC #3085E3 #66A5EA #9CC5F1 #D2E4F9

Accessibility & contrast

On white

2.58
#66A5EA on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.14
#66A5EA on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66A5EA
8.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66A5EA#FFFFFF#000000##000000
##66A5EA1.002.588.148.14
#FFFFFF2.581.0021.0021.00
#0000008.1421.001.001.00
##0000008.1421.001.001.00

Color blindness preview

Protanopia (red-blind)
#88A8ED
Deuteranopia (green-blind)
#779BE9
Tritanopia (blue-blind)
#00B5BD
Achromatopsia (no color)
#A1A1A1

Design tokens & code

CSS
--color: #66a5ea;
/* rgb */ color: rgb(102, 165, 234);
/* oklch */ color: oklch(70.8% 0.121 251.9);
Tailwind
colors: {
  custom: {
    50: '#9bbff1',
    500: '#66a5ea',
    950: '#000000',
  },
}
SCSS
$custom: #66a5ea;
$custom-light: #9bbff1;
$custom-dark: #000000;
JSON
{
  "hex": "#66a5ea",
  "rgb": {
    "r": 102,
    "g": 165,
    "b": 234
  },
  "hsl": {
    "h": 211.364,
    "s": 75.862,
    "l": 65.882
  },
  "oklch": {
    "l": 0.70831,
    "c": 0.12086,
    "h": 251.9
  },
  "luminance": 0.35676
}

Semantic roles & 50–950 ramp

primary
#66A5EA
secondary
#ECD7C0
accent
#770DD8
background
#FAFBFE
surface
#F3F7FD
border
#CDD0D5
text
#0F1216
muted
#7F8184

Preview Lab

Preview with #66A5EA

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

Preview Lab → · Contrast checker → · Palette generator →

#66A5EA Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva