#66ADE8#66ADE8

#66ADE8 is a light, moderate cyan. Relative luminance 0.385; OKLCH L 72.5% C 0.112 H 245.3°. Best body text is #000000 at 8.71:1 contrast (WCAG AA passes).

Color values

HEX#66ADE8
RGBrgb(102, 173, 232)
HSLhsl(207, 74%, 65%)
HSVhsv(207, 56%, 91%)
CMYKcmyk(56%, 25.4%, 0%, 9%)
CIE-LABlab(68.41, -5.52, -36.37)
CIE-LCHlch(68.41, 36.78, 261.36°)
OKLaboklab(72.49% -0.0469 -0.102)
OKLCHoklch(72.49% 0.112 245.3)
XYZxyz(34.9833, 38.5351, 81.9227)
Luminance0.3854 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66ADE8 #E8A166
analogous
#66E8E2 #66ADE8 #666CE8
triadic
#66ADE8 #E866AD #ADE866
tetradic
#66ADE8 #E266E8 #E8A166 #6CE866
square
#66ADE8 #E266E8 #E8A166 #6CE866
split-complementary
#66ADE8 #E8666C #E8E266
monochromatic
#1C71B8 #3190E0 #66ADE8 #9BCAF0 #D0E6F8

Accessibility & contrast

On white

2.41
#66ADE8 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.71
#66ADE8 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ADE8
8.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66ADE8#FFFFFF#000000##000000
##66ADE81.002.418.718.71
#FFFFFF2.411.0021.0021.00
#0000008.7121.001.001.00
##0000008.7121.001.001.00

Color blindness preview

Protanopia (red-blind)
#94AEEB
Deuteranopia (green-blind)
#82A1E7
Tritanopia (blue-blind)
#00BBC1
Achromatopsia (no color)
#A7A7A7

Design tokens & code

CSS
--color: #66ade8;
/* rgb */ color: rgb(102, 173, 232);
/* oklch */ color: oklch(72.5% 0.112 245.3);
Tailwind
colors: {
  custom: {
    50: '#9bc5ef',
    500: '#66ade8',
    950: '#000000',
  },
}
SCSS
$custom: #66ade8;
$custom-light: #9bc5ef;
$custom-dark: #000000;
JSON
{
  "hex": "#66ade8",
  "rgb": {
    "r": 102,
    "g": 173,
    "b": 232
  },
  "hsl": {
    "h": 207.231,
    "s": 73.864,
    "l": 65.49
  },
  "oklch": {
    "l": 0.72489,
    "c": 0.11226,
    "h": 245.3
  },
  "luminance": 0.38538
}

Semantic roles & 50–950 ramp

primary
#66ADE8
secondary
#EBD3BF
accent
#6A10D6
background
#FAFCFE
surface
#F3F8FD
border
#CDD1D5
text
#0F1216
muted
#7F8184

Preview Lab

Preview with #66ADE8

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

Preview Lab → · Contrast checker → · Palette generator →

#66ADE8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva