#66C8EB#66C8EB

#66C8EB is a light, moderate cyan. Relative luminance 0.501; OKLCH L 78.7% C 0.104 H 224.0°. Best body text is #000000 at 11.03:1 contrast (WCAG AA passes).

Color values

HEX	#66C8EB
RGB	rgb(102, 200, 235)
HSL	hsl(196, 77%, 66%)
HSV	hsv(196, 57%, 92%)
CMYK	cmyk(56.6%, 14.9%, 0%, 7.8%)
CIE-LAB	lab(76.15, -19.02, -26.06)
CIE-LCH	lch(76.15, 32.26, 233.88°)
OKLab	oklab(78.67% -0.0752 -0.0725)
OKLCH	oklch(78.67% 0.104 224)
XYZ	xyz(41.1233, 50.1276, 86.0896)
Luminance	0.5013 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C8EB #EB8966

analogous

#66EBCB #66C8EB #6685EB

triadic

#66C8EB #EB66C8 #C8EB66

tetradic

#66C8EB #CB66EB #EB8966 #85EB66

square

#66C8EB #CB66EB #EB8966 #85EB66

split-complementary

#66C8EB #EB6685 #EBCB66

monochromatic

#1992BE #30B5E4 #66C8EB #9CDBF2 #D2EFF9

Accessibility & contrast

On white

1.90

#66C8EB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.03

#66C8EB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C8EB

11.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C8EB	#FFFFFF	#000000	##000000
##66C8EB	1.00	1.90	11.03	11.03
#FFFFFF	1.90	1.00	21.00	21.00
#000000	11.03	21.00	1.00	1.00
##000000	11.03	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B4C4ED

Deuteranopia (green-blind)

#A1B6EB

Tritanopia (blue-blind)

#00D3D3

Achromatopsia (no color)

#BCBCBC

Design tokens & code

CSS

--color: #66c8eb;
/* rgb */ color: rgb(102, 200, 235);
/* oklch */ color: oklch(78.7% 0.104 224.0);

Tailwind

colors: {
  custom: {
    50: '#9cd8f1',
    500: '#66c8eb',
    950: '#000000',
  },
}

SCSS

$custom: #66c8eb;
$custom-light: #9cd8f1;
$custom-dark: #000000;

JSON

{
  "hex": "#66c8eb",
  "rgb": {
    "r": 102,
    "g": 200,
    "b": 235
  },
  "hsl": {
    "h": 195.789,
    "s": 76.879,
    "l": 66.078
  },
  "oklch": {
    "l": 0.78668,
    "c": 0.1044,
    "h": 224
  },
  "luminance": 0.50131
}

Semantic roles & 50–950 ramp

primary

#66C8EB

secondary

#BD5B39

accent

#420CD9

background

#FCFEFF

surface

#F5FBFE

border

#CFD4D6

text

#0F1416

muted

#808385

Preview Lab

Preview with #66C8EB

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

Preview Lab → · Contrast checker → · Palette generator →