#66C8EE#66C8EE

#66C8EE is a light, moderate cyan. Relative luminance 0.503; OKLCH L 78.8% C 0.107 H 226.0°. Best body text is #000000 at 11.06:1 contrast (WCAG AA passes).

Color values

HEX	#66C8EE
RGB	rgb(102, 200, 238)
HSL	hsl(197, 80%, 67%)
HSV	hsv(197, 57%, 93%)
CMYK	cmyk(57.1%, 16%, 0%, 6.7%)
CIE-LAB	lab(76.25, -18.14, -27.51)
CIE-LCH	lch(76.25, 32.96, 236.60°)
OKLab	oklab(78.79% -0.0741 -0.0766)
OKLCH	oklch(78.79% 0.107 226)
XYZ	xyz(41.5604, 50.3025, 88.3915)
Luminance	0.5031 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C8EE #EE8C66

analogous

#66EED0 #66C8EE #6684EE

triadic

#66C8EE #EE66C8 #C8EE66

tetradic

#66C8EE #D066EE #EE8C66 #84EE66

square

#66C8EE #D066EE #EE8C66 #84EE66

split-complementary

#66C8EE #EE6684 #EED066

monochromatic

#1693C4 #2FB4E8 #66C8EE #9DDCF4 #D4F0FA

Accessibility & contrast

On white

1.90

#66C8EE on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.06

#66C8EE on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C8EE

11.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C8EE	#FFFFFF	#000000	##000000
##66C8EE	1.00	1.90	11.06	11.06
#FFFFFF	1.90	1.00	21.00	21.00
#000000	11.06	21.00	1.00	1.00
##000000	11.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B3C4F0

Deuteranopia (green-blind)

#A0B6EE

Tritanopia (blue-blind)

#00D3D4

Achromatopsia (no color)

#BCBCBC

Design tokens & code

CSS

--color: #66c8ee;
/* rgb */ color: rgb(102, 200, 238);
/* oklch */ color: oklch(78.8% 0.107 226.0);

Tailwind

colors: {
  custom: {
    50: '#9cd8f3',
    500: '#66c8ee',
    950: '#000000',
  },
}

SCSS

$custom: #66c8ee;
$custom-light: #9cd8f3;
$custom-dark: #000000;

JSON

{
  "hex": "#66c8ee",
  "rgb": {
    "r": 102,
    "g": 200,
    "b": 238
  },
  "hsl": {
    "h": 196.765,
    "s": 80,
    "l": 66.667
  },
  "oklch": {
    "l": 0.78788,
    "c": 0.10653,
    "h": 226
  },
  "luminance": 0.50306
}

Semantic roles & 50–950 ramp

primary

#66C8EE

secondary

#C25D37

accent

#4409DC

background

#FCFEFF

surface

#F6FBFE

border

#D0D4D6

text

#0F1417

muted

#808385

Preview Lab

Preview with #66C8EE

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

Preview Lab → · Contrast checker → · Palette generator →