#66D3EE#66D3EE

#66D3EE is a light, moderate cyan. Relative luminance 0.556; OKLCH L 81.3% C 0.106 H 216.4°. Best body text is #000000 at 12.12:1 contrast (WCAG AA passes).

Color values

HEX	#66D3EE
RGB	rgb(102, 211, 238)
HSL	hsl(192, 80%, 67%)
HSV	hsv(192, 57%, 93%)
CMYK	cmyk(57.1%, 11.3%, 0%, 6.7%)
CIE-LAB	lab(79.38, -23.73, -22.75)
CIE-LCH	lch(79.38, 32.87, 223.80°)
OKLab	oklab(81.28% -0.0857 -0.0631)
OKLCH	oklch(81.28% 0.106 216.4)
XYZ	xyz(44.2002, 55.5821, 89.2714)
Luminance	0.5559 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66D3EE #EE8166

analogous

#66EEC5 #66D3EE #668FEE

triadic

#66D3EE #EE66D3 #D3EE66

tetradic

#66D3EE #C566EE #EE8166 #8FEE66

square

#66D3EE #C566EE #EE8166 #8FEE66

split-complementary

#66D3EE #EE668F #EEC566

monochromatic

#16A1C4 #2FC3E8 #66D3EE #9DE3F4 #D4F3FA

Accessibility & contrast

On white

1.73

#66D3EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

12.12

#66D3EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66D3EE

12.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66D3EE	#FFFFFF	#000000	##000000
##66D3EE	1.00	1.73	12.12	12.12
#FFFFFF	1.73	1.00	21.00	21.00
#000000	12.12	21.00	1.00	1.00
##000000	12.12	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#C1CDF0

Deuteranopia (green-blind)

#ACBEEE

Tritanopia (blue-blind)

#00DDDB

Achromatopsia (no color)

#C5C5C5

Design tokens & code

CSS

--color: #66d3ee;
/* rgb */ color: rgb(102, 211, 238);
/* oklch */ color: oklch(81.3% 0.106 216.4);

Tailwind

colors: {
  custom: {
    50: '#9de0f3',
    500: '#66d3ee',
    950: '#000000',
  },
}

SCSS

$custom: #66d3ee;
$custom-light: #9de0f3;
$custom-dark: #000000;

JSON

{
  "hex": "#66d3ee",
  "rgb": {
    "r": 102,
    "g": 211,
    "b": 238
  },
  "hsl": {
    "h": 191.912,
    "s": 80,
    "l": 66.667
  },
  "oklch": {
    "l": 0.81284,
    "c": 0.10645,
    "h": 216.4
  },
  "luminance": 0.55586
}

Semantic roles & 50–950 ramp

primary

#66D3EE

secondary

#C25237

accent

#3309DC

background

#FCFEFF

surface

#F6FCFE

border

#D0D5D6

text

#0F1517

muted

#808485

Preview Lab

Preview with #66D3EE

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

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