#66C3EC#66C3EC

#66C3EC is a light, moderate cyan. Relative luminance 0.479; OKLCH L 77.6% C 0.106 H 229.0°. Best body text is #000000 at 10.58:1 contrast (WCAG AA passes).

Color values

HEX	#66C3EC
RGB	rgb(102, 195, 236)
HSL	hsl(198, 78%, 66%)
HSV	hsv(198, 57%, 93%)
CMYK	cmyk(56.8%, 17.4%, 0%, 7.5%)
CIE-LAB	lab(74.77, -16.14, -28.72)
CIE-LCH	lch(74.77, 32.94, 240.67°)
OKLab	oklab(77.58% -0.0694 -0.08)
OKLCH	oklch(77.58% 0.106 229)
XYZ	xyz(40.1291, 47.9074, 86.4729)
Luminance	0.4791 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C3EC #EC8F66

analogous

#66ECD2 #66C3EC #6680EC

triadic

#66C3EC #EC66C3 #C3EC66

tetradic

#66C3EC #D266EC #EC8F66 #80EC66

square

#66C3EC #D266EC #EC8F66 #80EC66

split-complementary

#66C3EC #EC6680 #ECD266

monochromatic

#188CC0 #30AEE5 #66C3EC #9CD8F3 #D3EEFA

Accessibility & contrast

On white

1.98

#66C3EC on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.58

#66C3EC on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C3EC

10.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C3EC	#FFFFFF	#000000	##000000
##66C3EC	1.00	1.98	10.58	10.58
#FFFFFF	1.98	1.00	21.00	21.00
#000000	10.58	21.00	1.00	1.00
##000000	10.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AEC0EE

Deuteranopia (green-blind)

#9BB2EB

Tritanopia (blue-blind)

#00CFD0

Achromatopsia (no color)

#B8B8B8

Design tokens & code

CSS

--color: #66c3ec;
/* rgb */ color: rgb(102, 195, 236);
/* oklch */ color: oklch(77.6% 0.106 229.0);

Tailwind

colors: {
  custom: {
    50: '#9cd5f2',
    500: '#66c3ec',
    950: '#000000',
  },
}

SCSS

$custom: #66c3ec;
$custom-light: #9cd5f2;
$custom-dark: #000000;

JSON

{
  "hex": "#66c3ec",
  "rgb": {
    "r": 102,
    "g": 195,
    "b": 236
  },
  "hsl": {
    "h": 198.358,
    "s": 77.907,
    "l": 66.275
  },
  "oklch": {
    "l": 0.77578,
    "c": 0.10593,
    "h": 229
  },
  "luminance": 0.47911
}

Semantic roles & 50–950 ramp

primary

#66C3EC

secondary

#EDCEC1

accent

#4B0BDA

background

#FAFDFE

surface

#F4FAFD

border

#CED3D5

text

#0F1417

muted

#7F8385

Preview Lab

Preview with #66C3EC

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

Preview Lab → · Contrast checker → · Palette generator →