#66D0EE#66D0EE

#66D0EE is a light, moderate cyan. Relative luminance 0.541; OKLCH L 80.6% C 0.106 H 219.0°. Best body text is #000000 at 11.82:1 contrast (WCAG AA passes).

Color values

HEX	#66D0EE
RGB	rgb(102, 208, 238)
HSL	hsl(193, 80%, 67%)
HSV	hsv(193, 57%, 93%)
CMYK	cmyk(57.1%, 12.6%, 0%, 6.7%)
CIE-LAB	lab(78.52, -22.22, -24.05)
CIE-LCH	lch(78.52, 32.74, 227.26°)
OKLab	oklab(80.6% -0.0826 -0.0667)
OKLCH	oklch(80.6% 0.106 219)
XYZ	xyz(43.4619, 54.1054, 89.0253)
Luminance	0.5411 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D0EE #EE8466

analogous

#66EEC8 #66D0EE #668CEE

triadic

#66D0EE #EE66D0 #D0EE66

tetradic

#66D0EE #C866EE #EE8466 #8CEE66

square

#66D0EE #C866EE #EE8466 #8CEE66

split-complementary

#66D0EE #EE668C #EEC866

monochromatic

#169DC4 #2FBFE8 #66D0EE #9DE1F4 #D4F2FA

Accessibility & contrast

On white

1.78

#66D0EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.82

#66D0EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D0EE

11.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D0EE	#FFFFFF	#000000	##000000
##66D0EE	1.00	1.78	11.82	11.82
#FFFFFF	1.78	1.00	21.00	21.00
#000000	11.82	21.00	1.00	1.00
##000000	11.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BDCBF0

Deuteranopia (green-blind)

#A9BCEE

Tritanopia (blue-blind)

#00DAD9

Achromatopsia (no color)

#C2C2C2

Design tokens & code

CSS

--color: #66d0ee;
/* rgb */ color: rgb(102, 208, 238);
/* oklch */ color: oklch(80.6% 0.106 219.0);

Tailwind

colors: {
  custom: {
    50: '#9ddef3',
    500: '#66d0ee',
    950: '#000000',
  },
}

SCSS

$custom: #66d0ee;
$custom-light: #9ddef3;
$custom-dark: #000000;

JSON

{
  "hex": "#66d0ee",
  "rgb": {
    "r": 102,
    "g": 208,
    "b": 238
  },
  "hsl": {
    "h": 193.235,
    "s": 80,
    "l": 66.667
  },
  "oklch": {
    "l": 0.80601,
    "c": 0.10617,
    "h": 219
  },
  "luminance": 0.5411
}

Semantic roles & 50–950 ramp

primary

#66D0EE

secondary

#C25537

accent

#3809DC

background

#FCFEFF

surface

#F6FCFE

border

#D0D5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #66D0EE

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

Preview Lab → · Contrast checker → · Palette generator →