#66BEE5#66BEE5

#66BEE5 is a light, moderate cyan. Relative luminance 0.453; OKLCH L 76.2% C 0.101 H 229.0°. Best body text is #000000 at 10.06:1 contrast (WCAG AA passes).

Color values

HEX	#66BEE5
RGB	rgb(102, 190, 229)
HSL	hsl(198, 71%, 65%)
HSV	hsv(198, 55%, 90%)
CMYK	cmyk(55.5%, 17%, 0%, 10.2%)
CIE-LAB	lab(73.09, -15.58, -27.50)
CIE-LCH	lch(73.09, 31.61, 240.47°)
OKLab	oklab(76.16% -0.0665 -0.0766)
OKLCH	oklch(76.16% 0.101 229)
XYZ	xyz(38.0304, 45.3054, 80.8542)
Luminance	0.4531 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BEE5 #E58D66

analogous

#66E5CC #66BEE5 #667FE5

triadic

#66BEE5 #E566BE #BEE566

tetradic

#66BEE5 #CC66E5 #E58D66 #7FE566

square

#66BEE5 #CC66E5 #E58D66 #7FE566

split-complementary

#66BEE5 #E5667F #E5CC66

monochromatic

#1E85B2 #32A8DC #66BEE5 #9AD4EE #CFEAF7

Accessibility & contrast

On white

2.09

#66BEE5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.06

#66BEE5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BEE5

10.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BEE5	#FFFFFF	#000000	##000000
##66BEE5	1.00	2.09	10.06	10.06
#FFFFFF	2.09	1.00	21.00	21.00
#000000	10.06	21.00	1.00	1.00
##000000	10.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AABBE7

Deuteranopia (green-blind)

#98AEE5

Tritanopia (blue-blind)

#00C9CB

Achromatopsia (no color)

#B3B3B3

Design tokens & code

CSS

--color: #66bee5;
/* rgb */ color: rgb(102, 190, 229);
/* oklch */ color: oklch(76.2% 0.101 229.0);

Tailwind

colors: {
  custom: {
    50: '#9bd1ed',
    500: '#66bee5',
    950: '#000000',
  },
}

SCSS

$custom: #66bee5;
$custom-light: #9bd1ed;
$custom-dark: #000000;

JSON

{
  "hex": "#66bee5",
  "rgb": {
    "r": 102,
    "g": 190,
    "b": 229
  },
  "hsl": {
    "h": 198.425,
    "s": 70.95,
    "l": 64.902
  },
  "oklch": {
    "l": 0.7616,
    "c": 0.10142,
    "h": 229
  },
  "luminance": 0.45309
}

Semantic roles & 50–950 ramp

primary

#66BEE5

secondary

#E9CBBE

accent

#4E13D3

background

#FAFCFE

surface

#F3F9FD

border

#CDD2D5

text

#0F1416

muted

#7F8284

Preview Lab

Preview with #66BEE5

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

Preview Lab → · Contrast checker → · Palette generator →