#66D3EB#66D3EB

#66D3EB is a light, moderate cyan. Relative luminance 0.554; OKLCH L 81.2% C 0.105 H 214.2°. Best body text is #000000 at 12.08:1 contrast (WCAG AA passes).

Color values

HEX	#66D3EB
RGB	rgb(102, 211, 235)
HSL	hsl(191, 77%, 66%)
HSV	hsv(191, 57%, 92%)
CMYK	cmyk(56.6%, 10.2%, 0%, 7.8%)
CIE-LAB	lab(79.28, -24.57, -21.30)
CIE-LCH	lch(79.28, 32.52, 220.92°)
OKLab	oklab(81.17% -0.0869 -0.059)
OKLCH	oklch(81.17% 0.105 214.2)
XYZ	xyz(43.7632, 55.4072, 86.9695)
Luminance	0.5541 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D3EB #EB7E66

analogous

#66EBC0 #66D3EB #6690EB

triadic

#66D3EB #EB66D3 #D3EB66

tetradic

#66D3EB #C066EB #EB7E66 #90EB66

square

#66D3EB #C066EB #EB7E66 #90EB66

split-complementary

#66D3EB #EB6690 #EBC066

monochromatic

#19A0BE #30C3E4 #66D3EB #9CE3F2 #D2F2F9

Accessibility & contrast

On white

1.74

#66D3EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.08

#66D3EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D3EB

12.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D3EB	#FFFFFF	#000000	##000000
##66D3EB	1.00	1.74	12.08	12.08
#FFFFFF	1.74	1.00	21.00	21.00
#000000	12.08	21.00	1.00	1.00
##000000	12.08	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C1CDEC

Deuteranopia (green-blind)

#ADBEEB

Tritanopia (blue-blind)

#00DCDA

Achromatopsia (no color)

#C4C4C4

Design tokens & code

CSS

--color: #66d3eb;
/* rgb */ color: rgb(102, 211, 235);
/* oklch */ color: oklch(81.2% 0.105 214.2);

Tailwind

colors: {
  custom: {
    50: '#9ce0f1',
    500: '#66d3eb',
    950: '#000000',
  },
}

SCSS

$custom: #66d3eb;
$custom-light: #9ce0f1;
$custom-dark: #000000;

JSON

{
  "hex": "#66d3eb",
  "rgb": {
    "r": 102,
    "g": 211,
    "b": 235
  },
  "hsl": {
    "h": 190.827,
    "s": 76.879,
    "l": 66.078
  },
  "oklch": {
    "l": 0.8117,
    "c": 0.10503,
    "h": 214.2
  },
  "luminance": 0.55411
}

Semantic roles & 50–950 ramp

primary

#66D3EB

secondary

#BD5039

accent

#310CD9

background

#FCFEFF

surface

#F6FCFE

border

#D0D5D6

text

#0F1516

muted

#808485

Preview Lab

Preview with #66D3EB

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

Preview Lab → · Contrast checker → · Palette generator →