#66C3EE#66C3EE

#66C3EE is a light, moderate cyan. Relative luminance 0.480; OKLCH L 77.7% C 0.108 H 230.3°. Best body text is #000000 at 10.61:1 contrast (WCAG AA passes).

Color values

HEX	#66C3EE
RGB	rgb(102, 195, 238)
HSL	hsl(199, 80%, 67%)
HSV	hsv(199, 57%, 93%)
CMYK	cmyk(57.1%, 18.1%, 0%, 6.7%)
CIE-LAB	lab(74.84, -15.55, -29.68)
CIE-LCH	lch(74.84, 33.51, 242.36°)
OKLab	oklab(77.66% -0.0687 -0.0827)
OKLCH	oklch(77.66% 0.108 230.3)
XYZ	xyz(40.4213, 48.0243, 88.0118)
Luminance	0.4803 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C3EE #EE9166

analogous

#66EED5 #66C3EE #667FEE

triadic

#66C3EE #EE66C3 #C3EE66

tetradic

#66C3EE #D566EE #EE9166 #7FEE66

square

#66C3EE #D566EE #EE9166 #7FEE66

split-complementary

#66C3EE #EE667F #EED566

monochromatic

#168DC4 #2FADE8 #66C3EE #9DD9F4 #D4EEFA

Accessibility & contrast

On white

1.98

#66C3EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.61

#66C3EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C3EE

10.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C3EE	#FFFFFF	#000000	##000000
##66C3EE	1.00	1.98	10.61	10.61
#FFFFFF	1.98	1.00	21.00	21.00
#000000	10.61	21.00	1.00	1.00
##000000	10.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ADC0F0

Deuteranopia (green-blind)

#9AB2ED

Tritanopia (blue-blind)

#00CFD1

Achromatopsia (no color)

#B8B8B8

Design tokens & code

CSS

--color: #66c3ee;
/* rgb */ color: rgb(102, 195, 238);
/* oklch */ color: oklch(77.7% 0.108 230.3);

Tailwind

colors: {
  custom: {
    50: '#9cd5f3',
    500: '#66c3ee',
    950: '#000000',
  },
}

SCSS

$custom: #66c3ee;
$custom-light: #9cd5f3;
$custom-dark: #000000;

JSON

{
  "hex": "#66c3ee",
  "rgb": {
    "r": 102,
    "g": 195,
    "b": 238
  },
  "hsl": {
    "h": 198.971,
    "s": 80,
    "l": 66.667
  },
  "oklch": {
    "l": 0.77661,
    "c": 0.10757,
    "h": 230.3
  },
  "luminance": 0.48028
}

Semantic roles & 50–950 ramp

primary

#66C3EE

secondary

#EED0C2

accent

#4C09DC

background

#FAFDFE

surface

#F4FAFD

border

#CED3D5

text

#0F1417

muted

#7F8385

Preview Lab

Preview with #66C3EE

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

Preview Lab → · Contrast checker → · Palette generator →