#66C0EA#66C0EA

#66C0EA is a light, moderate cyan. Relative luminance 0.465; OKLCH L 76.8% C 0.105 H 230.4°. Best body text is #000000 at 10.29:1 contrast (WCAG AA passes).

Color values

HEX	#66C0EA
RGB	rgb(102, 192, 234)
HSL	hsl(199, 76%, 66%)
HSV	hsv(199, 56%, 92%)
CMYK	cmyk(56.4%, 17.9%, 0%, 8.2%)
CIE-LAB	lab(73.84, -15.16, -29.06)
CIE-LCH	lch(73.84, 32.77, 242.45°)
OKLab	oklab(76.82% -0.0669 -0.081)
OKLCH	oklch(76.82% 0.105 230.4)
XYZ	xyz(39.1748, 46.4610, 84.7293)
Luminance	0.4647 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C0EA #EA9066

analogous

#66EAD2 #66C0EA #667EEA

triadic

#66C0EA #EA66C0 #C0EA66

tetradic

#66C0EA #D266EA #EA9066 #7EEA66

square

#66C0EA #D266EA #EA9066 #7EEA66

split-complementary

#66C0EA #EA667E #EAD266

monochromatic

#1A88BC #30AAE3 #66C0EA #9CD6F1 #D2ECF9

Accessibility & contrast

On white

2.04

#66C0EA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.29

#66C0EA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C0EA

10.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C0EA	#FFFFFF	#000000	##000000
##66C0EA	1.00	2.04	10.29	10.29
#FFFFFF	2.04	1.00	21.00	21.00
#000000	10.29	21.00	1.00	1.00
##000000	10.29	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ABBDEC

Deuteranopia (green-blind)

#98AFE9

Tritanopia (blue-blind)

#00CCCE

Achromatopsia (no color)

#B5B5B5

Design tokens & code

CSS

--color: #66c0ea;
/* rgb */ color: rgb(102, 192, 234);
/* oklch */ color: oklch(76.8% 0.105 230.4);

Tailwind

colors: {
  custom: {
    50: '#9bd3f0',
    500: '#66c0ea',
    950: '#000000',
  },
}

SCSS

$custom: #66c0ea;
$custom-light: #9bd3f0;
$custom-dark: #000000;

JSON

{
  "hex": "#66c0ea",
  "rgb": {
    "r": 102,
    "g": 192,
    "b": 234
  },
  "hsl": {
    "h": 199.091,
    "s": 75.862,
    "l": 65.882
  },
  "oklch": {
    "l": 0.76819,
    "c": 0.10504,
    "h": 230.4
  },
  "luminance": 0.46465
}

Semantic roles & 50–950 ramp

primary

#66C0EA

secondary

#ECCEC0

accent

#4E0DD8

background

#FAFCFE

surface

#F4F9FD

border

#CED2D5

text

#0F1416

muted

#7F8284

Preview Lab

Preview with #66C0EA

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

Preview Lab → · Contrast checker → · Palette generator →