#66D0EF#66D0EF

#66D0EF is a light, moderate cyan. Relative luminance 0.542; OKLCH L 80.6% C 0.107 H 219.7°. Best body text is #000000 at 11.83:1 contrast (WCAG AA passes).

Color values

HEX	#66D0EF
RGB	rgb(102, 208, 239)
HSL	hsl(194, 81%, 67%)
HSV	hsv(194, 57%, 94%)
CMYK	cmyk(57.3%, 13%, 0%, 6.3%)
CIE-LAB	lab(78.56, -21.93, -24.53)
CIE-LCH	lch(78.56, 32.91, 228.20°)
OKLab	oklab(80.64% -0.0822 -0.0681)
OKLCH	oklch(80.64% 0.107 219.7)
XYZ	xyz(43.6092, 54.1643, 89.8012)
Luminance	0.5417 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D0EF #EF8566

analogous

#66EFCA #66D0EF #668CEF

triadic

#66D0EF #EF66D0 #D0EF66

tetradic

#66D0EF #CA66EF #EF8566 #8CEF66

square

#66D0EF #CA66EF #EF8566 #8CEF66

split-complementary

#66D0EF #EF668C #EFCA66

monochromatic

#159EC6 #2FBFE9 #66D0EF #9DE1F5 #D5F2FB

Accessibility & contrast

On white

1.77

#66D0EF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.83

#66D0EF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D0EF

11.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D0EF	#FFFFFF	#000000	##000000
##66D0EF	1.00	1.77	11.83	11.83
#FFFFFF	1.77	1.00	21.00	21.00
#000000	11.83	21.00	1.00	1.00
##000000	11.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BDCBF1

Deuteranopia (green-blind)

#A9BCEF

Tritanopia (blue-blind)

#00DADA

Achromatopsia (no color)

#C2C2C2

Design tokens & code

CSS

--color: #66d0ef;
/* rgb */ color: rgb(102, 208, 239);
/* oklch */ color: oklch(80.6% 0.107 219.7);

Tailwind

colors: {
  custom: {
    50: '#9ddef4',
    500: '#66d0ef',
    950: '#000000',
  },
}

SCSS

$custom: #66d0ef;
$custom-light: #9ddef4;
$custom-dark: #000000;

JSON

{
  "hex": "#66d0ef",
  "rgb": {
    "r": 102,
    "g": 208,
    "b": 239
  },
  "hsl": {
    "h": 193.577,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.8064,
    "c": 0.10674,
    "h": 219.7
  },
  "luminance": 0.54169
}

Semantic roles & 50–950 ramp

primary

#66D0EF

secondary

#C35636

accent

#3808DD

background

#FCFEFF

surface

#F6FCFE

border

#D0D5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #66D0EF

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

Preview Lab → · Contrast checker → · Palette generator →