#66C8DD#66C8DD

#66C8DD is a light, moderate cyan. Relative luminance 0.494; OKLCH L 78.1% C 0.096 H 213.5°. Best body text is #000000 at 10.87:1 contrast (WCAG AA passes).

Color values

HEX	#66C8DD
RGB	rgb(102, 200, 221)
HSL	hsl(191, 64%, 63%)
HSV	hsv(191, 54%, 87%)
CMYK	cmyk(53.8%, 9.5%, 0%, 13.3%)
CIE-LAB	lab(75.67, -23.01, -19.25)
CIE-LCH	lch(75.67, 30.00, 219.91°)
OKLab	oklab(78.13% -0.0805 -0.0533)
OKLCH	oklch(78.13% 0.096 213.5)
XYZ	xyz(39.1798, 49.3502, 75.8534)
Luminance	0.4935 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C8DD #DD7B66

analogous

#66DDB6 #66C8DD #668CDD

triadic

#66C8DD #DD66C8 #C8DD66

tetradic

#66C8DD #B666DD #DD7B66 #8CDD66

square

#66C8DD #B666DD #DD7B66 #8CDD66

split-complementary

#66C8DD #DD668C #DDB666

monochromatic

#248EA4 #34B6D2 #66C8DD #98DAE8 #CAECF3

Accessibility & contrast

On white

1.93

#66C8DD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.87

#66C8DD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C8DD

10.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C8DD	#FFFFFF	#000000	##000000
##66C8DD	1.00	1.93	10.87	10.87
#FFFFFF	1.93	1.00	21.00	21.00
#000000	10.87	21.00	1.00	1.00
##000000	10.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B8C2DE

Deuteranopia (green-blind)

#A6B5DD

Tritanopia (blue-blind)

#00D0CE

Achromatopsia (no color)

#BABABA

Design tokens & code

CSS

--color: #66c8dd;
/* rgb */ color: rgb(102, 200, 221);
/* oklch */ color: oklch(78.1% 0.096 213.5);

Tailwind

colors: {
  custom: {
    50: '#9bd9e7',
    500: '#66c8dd',
    950: '#000000',
  },
}

SCSS

$custom: #66c8dd;
$custom-light: #9bd9e7;
$custom-dark: #000000;

JSON

{
  "hex": "#66c8dd",
  "rgb": {
    "r": 102,
    "g": 200,
    "b": 221
  },
  "hsl": {
    "h": 190.588,
    "s": 63.636,
    "l": 63.333
  },
  "oklch": {
    "l": 0.78126,
    "c": 0.09649,
    "h": 213.5
  },
  "luminance": 0.49354
}

Semantic roles & 50–950 ramp

primary

#66C8DD

secondary

#E5C2BA

accent

#391ACB

background

#FAFDFE

surface

#F3FAFC

border

#CDD3D5

text

#0F1416

muted

#7F8384

Preview Lab

Preview with #66C8DD

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

Preview Lab → · Contrast checker → · Palette generator →