#66C2E9#66C2E9

#66C2E9 is a light, moderate cyan. Relative luminance 0.473; OKLCH L 77.2% C 0.104 H 228.0°. Best body text is #000000 at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#66C2E9
RGB	rgb(102, 194, 233)
HSL	hsl(198, 75%, 66%)
HSV	hsv(198, 56%, 91%)
CMYK	cmyk(56.2%, 16.7%, 0%, 8.6%)
CIE-LAB	lab(74.37, -16.50, -27.70)
CIE-LCH	lch(74.37, 32.24, 239.22°)
OKLab	oklab(77.23% -0.0694 -0.0771)
OKLCH	oklch(77.23% 0.104 228)
XYZ	xyz(39.4736, 47.2879, 84.1223)
Luminance	0.4729 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66C2E9 #E98D66

analogous

#66E9CF #66C2E9 #6680E9

triadic

#66C2E9 #E966C2 #C2E966

tetradic

#66C2E9 #CF66E9 #E98D66 #80E966

square

#66C2E9 #CF66E9 #E98D66 #80E966

split-complementary

#66C2E9 #E96680 #E9CF66

monochromatic

#1B8ABA #30ADE1 #66C2E9 #9CD7F1 #D1EDF8

Accessibility & contrast

On white

2.01

#66C2E9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.46

#66C2E9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66C2E9

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66C2E9	#FFFFFF	#000000	##000000
##66C2E9	1.00	2.01	10.46	10.46
#FFFFFF	2.01	1.00	21.00	21.00
#000000	10.46	21.00	1.00	1.00
##000000	10.46	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AEBFEB

Deuteranopia (green-blind)

#9BB1E9

Tritanopia (blue-blind)

#00CDCF

Achromatopsia (no color)

#B7B7B7

Design tokens & code

CSS

--color: #66c2e9;
/* rgb */ color: rgb(102, 194, 233);
/* oklch */ color: oklch(77.2% 0.104 228.0);

Tailwind

colors: {
  custom: {
    50: '#9bd4f0',
    500: '#66c2e9',
    950: '#000000',
  },
}

SCSS

$custom: #66c2e9;
$custom-light: #9bd4f0;
$custom-dark: #000000;

JSON

{
  "hex": "#66c2e9",
  "rgb": {
    "r": 102,
    "g": 194,
    "b": 233
  },
  "hsl": {
    "h": 197.863,
    "s": 74.857,
    "l": 65.686
  },
  "oklch": {
    "l": 0.77229,
    "c": 0.10376,
    "h": 228
  },
  "luminance": 0.47292
}

Semantic roles & 50–950 ramp

primary

#66C2E9

secondary

#EBCDC0

accent

#4A0ED7

background

#FAFDFE

surface

#F4FAFD

border

#CED3D5

text

#0F1416

muted

#7F8384

Preview Lab

Preview with #66C2E9

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

Preview Lab → · Contrast checker → · Palette generator →