#66D3EC#66D3EC

#66D3EC is a light, moderate cyan. Relative luminance 0.555; OKLCH L 81.2% C 0.105 H 214.9°. Best body text is #000000 at 12.09:1 contrast (WCAG AA passes).

Color values

HEX	#66D3EC
RGB	rgb(102, 211, 236)
HSL	hsl(191, 78%, 66%)
HSV	hsv(191, 57%, 93%)
CMYK	cmyk(56.8%, 10.6%, 0%, 7.5%)
CIE-LAB	lab(79.31, -24.29, -21.78)
CIE-LCH	lch(79.31, 32.63, 221.88°)
OKLab	oklab(81.21% -0.0865 -0.0604)
OKLCH	oklch(81.21% 0.105 214.9)
XYZ	xyz(43.9080, 55.4652, 87.7325)
Luminance	0.5547 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D3EC #EC7F66

analogous

#66ECC2 #66D3EC #6690EC

triadic

#66D3EC #EC66D3 #D3EC66

tetradic

#66D3EC #C266EC #EC7F66 #90EC66

square

#66D3EC #C266EC #EC7F66 #90EC66

split-complementary

#66D3EC #EC6690 #ECC266

monochromatic

#18A0C0 #30C3E5 #66D3EC #9CE3F3 #D3F2FA

Accessibility & contrast

On white

1.74

#66D3EC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.09

#66D3EC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D3EC

12.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D3EC	#FFFFFF	#000000	##000000
##66D3EC	1.00	1.74	12.09	12.09
#FFFFFF	1.74	1.00	21.00	21.00
#000000	12.09	21.00	1.00	1.00
##000000	12.09	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C1CDED

Deuteranopia (green-blind)

#ADBEEC

Tritanopia (blue-blind)

#00DDDB

Achromatopsia (no color)

#C4C4C4

Design tokens & code

CSS

--color: #66d3ec;
/* rgb */ color: rgb(102, 211, 236);
/* oklch */ color: oklch(81.2% 0.105 214.9);

Tailwind

colors: {
  custom: {
    50: '#9de0f2',
    500: '#66d3ec',
    950: '#000000',
  },
}

SCSS

$custom: #66d3ec;
$custom-light: #9de0f2;
$custom-dark: #000000;

JSON

{
  "hex": "#66d3ec",
  "rgb": {
    "r": 102,
    "g": 211,
    "b": 236
  },
  "hsl": {
    "h": 191.194,
    "s": 77.907,
    "l": 66.275
  },
  "oklch": {
    "l": 0.81208,
    "c": 0.10548,
    "h": 214.9
  },
  "luminance": 0.55469
}

Semantic roles & 50–950 ramp

primary

#66D3EC

secondary

#BE5138

accent

#320BDA

background

#FCFEFF

surface

#F6FCFE

border

#D0D5D6

text

#0F1516

muted

#808485

Preview Lab

Preview with #66D3EC

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

Preview Lab → · Contrast checker → · Palette generator →