#66C0EE#66C0EE

#66C0EE is a light, moderate cyan. Relative luminance 0.467; OKLCH L 77.0% C 0.108 H 232.9°. Best body text is #000000 at 10.34:1 contrast (WCAG AA passes).

Color values

HEX	#66C0EE
RGB	rgb(102, 192, 238)
HSL	hsl(200, 80%, 67%)
HSV	hsv(200, 57%, 93%)
CMYK	cmyk(57.1%, 19.3%, 0%, 6.7%)
CIE-LAB	lab(73.99, -13.97, -30.99)
CIE-LCH	lch(73.99, 33.99, 245.73°)
OKLab	oklab(76.99% -0.0655 -0.0865)
OKLCH	oklch(76.99% 0.109 232.9)
XYZ	xyz(39.7559, 46.6934, 87.7900)
Luminance	0.4670 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C0EE #EE9466

analogous

#66EED8 #66C0EE #667CEE

triadic

#66C0EE #EE66C0 #C0EE66

tetradic

#66C0EE #D866EE #EE9466 #7CEE66

square

#66C0EE #D866EE #EE9466 #7CEE66

split-complementary

#66C0EE #EE667C #EED866

monochromatic

#1689C4 #2FA9E8 #66C0EE #9DD7F4 #D4EDFA

Accessibility & contrast

On white

2.03

#66C0EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.34

#66C0EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C0EE

10.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C0EE	#FFFFFF	#000000	##000000
##66C0EE	1.00	2.03	10.34	10.34
#FFFFFF	2.03	1.00	21.00	21.00
#000000	10.34	21.00	1.00	1.00
##000000	10.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AABEF0

Deuteranopia (green-blind)

#97B0ED

Tritanopia (blue-blind)

#00CCCF

Achromatopsia (no color)

#B6B6B6

Design tokens & code

CSS

--color: #66c0ee;
/* rgb */ color: rgb(102, 192, 238);
/* oklch */ color: oklch(77.0% 0.108 232.9);

Tailwind

colors: {
  custom: {
    50: '#9cd3f3',
    500: '#66c0ee',
    950: '#000000',
  },
}

SCSS

$custom: #66c0ee;
$custom-light: #9cd3f3;
$custom-dark: #000000;

JSON

{
  "hex": "#66c0ee",
  "rgb": {
    "r": 102,
    "g": 192,
    "b": 238
  },
  "hsl": {
    "h": 200.294,
    "s": 80,
    "l": 66.667
  },
  "oklch": {
    "l": 0.76987,
    "c": 0.1085,
    "h": 232.9
  },
  "luminance": 0.46697
}

Semantic roles & 50–950 ramp

primary

#66C0EE

secondary

#EED1C2

accent

#5109DC

background

#FAFCFE

surface

#F4F9FD

border

#CED2D5

text

#0F1417

muted

#7F8285

Preview Lab

Preview with #66C0EE

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

Preview Lab → · Contrast checker → · Palette generator →