#66C3EB#66C3EB

#66C3EB is a light, moderate cyan. Relative luminance 0.479; OKLCH L 77.5% C 0.105 H 228.4°. Best body text is #000000 at 10.57:1 contrast (WCAG AA passes).

Color values

HEX	#66C3EB
RGB	rgb(102, 195, 235)
HSL	hsl(198, 77%, 66%)
HSV	hsv(198, 57%, 92%)
CMYK	cmyk(56.6%, 17%, 0%, 7.8%)
CIE-LAB	lab(74.73, -16.43, -28.24)
CIE-LCH	lch(74.73, 32.67, 239.80°)
OKLab	oklab(77.54% -0.0698 -0.0786)
OKLCH	oklch(77.54% 0.105 228.4)
XYZ	xyz(39.9842, 47.8494, 85.7099)
Luminance	0.4785 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C3EB #EB8E66

analogous

#66EBD0 #66C3EB #6680EB

triadic

#66C3EB #EB66C3 #C3EB66

tetradic

#66C3EB #D066EB #EB8E66 #80EB66

square

#66C3EB #D066EB #EB8E66 #80EB66

split-complementary

#66C3EB #EB6680 #EBD066

monochromatic

#198CBE #30AEE4 #66C3EB #9CD8F2 #D2EDF9

Accessibility & contrast

On white

1.99

#66C3EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.57

#66C3EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C3EB

10.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C3EB	#FFFFFF	#000000	##000000
##66C3EB	1.00	1.99	10.57	10.57
#FFFFFF	1.99	1.00	21.00	21.00
#000000	10.57	21.00	1.00	1.00
##000000	10.57	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AEC0ED

Deuteranopia (green-blind)

#9BB2EB

Tritanopia (blue-blind)

#00CED0

Achromatopsia (no color)

#B8B8B8

Design tokens & code

CSS

--color: #66c3eb;
/* rgb */ color: rgb(102, 195, 235);
/* oklch */ color: oklch(77.5% 0.105 228.4);

Tailwind

colors: {
  custom: {
    50: '#9cd5f1',
    500: '#66c3eb',
    950: '#000000',
  },
}

SCSS

$custom: #66c3eb;
$custom-light: #9cd5f1;
$custom-dark: #000000;

JSON

{
  "hex": "#66c3eb",
  "rgb": {
    "r": 102,
    "g": 195,
    "b": 235
  },
  "hsl": {
    "h": 198.045,
    "s": 76.879,
    "l": 66.078
  },
  "oklch": {
    "l": 0.77537,
    "c": 0.10513,
    "h": 228.4
  },
  "luminance": 0.47853
}

Semantic roles & 50–950 ramp

primary

#66C3EB

secondary

#ECCEC1

accent

#4A0CD9

background

#FAFDFE

surface

#F4FAFD

border

#CED3D5

text

#0F1416

muted

#7F8384

Preview Lab

Preview with #66C3EB

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

Preview Lab → · Contrast checker → · Palette generator →