#66ADE5#66ADE5

#66ADE5 is a light, moderate cyan. Relative luminance 0.384; OKLCH L 72.4% C 0.109 H 243.9°. Best body text is #000000 at 8.67:1 contrast (WCAG AA passes).

Color values

HEX#66ADE5
RGBrgb(102, 173, 229)
HSLhsl(206, 71%, 65%)
HSVhsv(206, 55%, 90%)
CMYKcmyk(55.5%, 24.5%, 0%, 10.2%)
CIE-LABlab(68.29, -6.44, -34.92)
CIE-LCHlch(68.29, 35.51, 259.55°)
OKLaboklab(72.35% -0.0479 -0.0978)
OKLCHoklch(72.35% 0.109 243.9)
XYZxyz(34.5608, 38.3661, 79.6977)
Luminance0.3837 (WCAG relative)
Temperaturecool
Familycyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#66ADE5 #E59E66
analogous
#66E5DE #66ADE5 #666DE5
triadic
#66ADE5 #E566AD #ADE566
tetradic
#66ADE5 #DE66E5 #E59E66 #6DE566
square
#66ADE5 #DE66E5 #E59E66 #6DE566
split-complementary
#66ADE5 #E5666D #E5DE66
monochromatic
#1E71B2 #3291DC #66ADE5 #9AC9EE #CFE5F7

Accessibility & contrast

On white

2.42
#66ADE5 on #FFFFFF
AA ✗AA large ✗AAA ✗

On black

8.67
#66ADE5 on #000000
AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66ADE5
8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##66ADE5#FFFFFF#000000##000000
##66ADE51.002.428.678.67
#FFFFFF2.421.0021.0021.00
#0000008.6721.001.001.00
##0000008.6721.001.001.00

Color blindness preview

Protanopia (red-blind)
#95AEE8
Deuteranopia (green-blind)
#84A1E4
Tritanopia (blue-blind)
#00BBC0
Achromatopsia (no color)
#A6A6A6

Design tokens & code

CSS
--color: #66ade5;
/* rgb */ color: rgb(102, 173, 229);
/* oklch */ color: oklch(72.4% 0.109 243.9);
Tailwind
colors: {
  custom: {
    50: '#9ac5ed',
    500: '#66ade5',
    950: '#000000',
  },
}
SCSS
$custom: #66ade5;
$custom-light: #9ac5ed;
$custom-dark: #000000;
JSON
{
  "hex": "#66ade5",
  "rgb": {
    "r": 102,
    "g": 173,
    "b": 229
  },
  "hsl": {
    "h": 206.457,
    "s": 70.95,
    "l": 64.902
  },
  "oklch": {
    "l": 0.72351,
    "c": 0.1089,
    "h": 243.9
  },
  "luminance": 0.38369
}

Semantic roles & 50–950 ramp

primary
#66ADE5
secondary
#E9D1BE
accent
#6713D3
background
#FAFCFE
surface
#F3F8FD
border
#CDD1D5
text
#0F1216
muted
#7F8184

Preview Lab

Preview with #66ADE5

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

Preview Lab → · Contrast checker → · Palette generator →

#66ADE5 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva