#66C0EB#66C0EB

#66C0EB is a light, moderate cyan. Relative luminance 0.465; OKLCH L 76.9% C 0.106 H 231.0°. Best body text is #000000 at 10.30:1 contrast (WCAG AA passes).

Color values

HEX	#66C0EB
RGB	rgb(102, 192, 235)
HSL	hsl(199, 77%, 66%)
HSV	hsv(199, 57%, 92%)
CMYK	cmyk(56.6%, 18.3%, 0%, 7.8%)
CIE-LAB	lab(73.88, -14.86, -29.54)
CIE-LCH	lch(73.88, 33.07, 243.29°)
OKLab	oklab(76.86% -0.0666 -0.0824)
OKLCH	oklch(76.86% 0.106 231)
XYZ	xyz(39.3188, 46.5186, 85.4881)
Luminance	0.4652 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C0EB #EB9166

analogous

#66EBD3 #66C0EB #667DEB

triadic

#66C0EB #EB66C0 #C0EB66

tetradic

#66C0EB #D366EB #EB9166 #7DEB66

square

#66C0EB #D366EB #EB9166 #7DEB66

split-complementary

#66C0EB #EB667D #EBD366

monochromatic

#1988BE #30AAE4 #66C0EB #9CD6F2 #D2EDF9

Accessibility & contrast

On white

2.04

#66C0EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.30

#66C0EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C0EB

10.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C0EB	#FFFFFF	#000000	##000000
##66C0EB	1.00	2.04	10.30	10.30
#FFFFFF	2.04	1.00	21.00	21.00
#000000	10.30	21.00	1.00	1.00
##000000	10.30	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ABBEED

Deuteranopia (green-blind)

#98AFEA

Tritanopia (blue-blind)

#00CCCE

Achromatopsia (no color)

#B6B6B6

Design tokens & code

CSS

--color: #66c0eb;
/* rgb */ color: rgb(102, 192, 235);
/* oklch */ color: oklch(76.9% 0.106 231.0);

Tailwind

colors: {
  custom: {
    50: '#9bd3f1',
    500: '#66c0eb',
    950: '#000000',
  },
}

SCSS

$custom: #66c0eb;
$custom-light: #9bd3f1;
$custom-dark: #000000;

JSON

{
  "hex": "#66c0eb",
  "rgb": {
    "r": 102,
    "g": 192,
    "b": 235
  },
  "hsl": {
    "h": 199.398,
    "s": 76.879,
    "l": 66.078
  },
  "oklch": {
    "l": 0.76861,
    "c": 0.10589,
    "h": 231
  },
  "luminance": 0.46522
}

Semantic roles & 50–950 ramp

primary

#66C0EB

secondary

#ECCFC1

accent

#4F0CD9

background

#FAFCFE

surface

#F4F9FD

border

#CED2D5

text

#0F1416

muted

#7F8284

Preview Lab

Preview with #66C0EB

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

Preview Lab → · Contrast checker → · Palette generator →