#66D4EA#66D4EA

#66D4EA is a light, moderate cyan. Relative luminance 0.559; OKLCH L 81.4% C 0.105 H 212.6°. Best body text is #000000 at 12.17:1 contrast (WCAG AA passes).

Color values

HEX	#66D4EA
RGB	rgb(102, 212, 234)
HSL	hsl(190, 76%, 66%)
HSV	hsv(190, 56%, 92%)
CMYK	cmyk(56.4%, 9.4%, 0%, 8.2%)
CIE-LAB	lab(79.53, -25.35, -20.38)
CIE-LCH	lch(79.53, 32.53, 218.80°)
OKLab	oklab(81.36% -0.0883 -0.0564)
OKLCH	oklch(81.36% 0.105 212.6)
XYZ	xyz(43.8683, 55.8480, 86.2939)
Luminance	0.5585 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D4EA #EA7C66

analogous

#66EABE #66D4EA #6692EA

triadic

#66D4EA #EA66D4 #D4EA66

tetradic

#66D4EA #BE66EA #EA7C66 #92EA66

square

#66D4EA #BE66EA #EA7C66 #92EA66

split-complementary

#66D4EA #EA6692 #EABE66

monochromatic

#1AA1BC #30C5E3 #66D4EA #9CE3F1 #D2F2F9

Accessibility & contrast

On white

1.73

#66D4EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.17

#66D4EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D4EA

12.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D4EA	#FFFFFF	#000000	##000000
##66D4EA	1.00	1.73	12.17	12.17
#FFFFFF	1.73	1.00	21.00	21.00
#000000	12.17	21.00	1.00	1.00
##000000	12.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C3CEEB

Deuteranopia (green-blind)

#AFBFEA

Tritanopia (blue-blind)

#00DDDB

Achromatopsia (no color)

#C5C5C5

Design tokens & code

CSS

--color: #66d4ea;
/* rgb */ color: rgb(102, 212, 234);
/* oklch */ color: oklch(81.4% 0.105 212.6);

Tailwind

colors: {
  custom: {
    50: '#9ce1f0',
    500: '#66d4ea',
    950: '#000000',
  },
}

SCSS

$custom: #66d4ea;
$custom-light: #9ce1f0;
$custom-dark: #000000;

JSON

{
  "hex": "#66d4ea",
  "rgb": {
    "r": 102,
    "g": 212,
    "b": 234
  },
  "hsl": {
    "h": 190,
    "s": 75.862,
    "l": 65.882
  },
  "oklch": {
    "l": 0.81362,
    "c": 0.10482,
    "h": 212.6
  },
  "luminance": 0.55852
}

Semantic roles & 50–950 ramp

primary

#66D4EA

secondary

#BB4F39

accent

#2F0DD8

background

#FCFEFF

surface

#F6FCFE

border

#D0D5D6

text

#0F1516

muted

#808485

Preview Lab

Preview with #66D4EA

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

Preview Lab → · Contrast checker → · Palette generator →