#66BEE9#66BEE9

#66BEE9 is a light, moderate cyan. Relative luminance 0.455; OKLCH L 76.3% C 0.105 H 231.6°. Best body text is #000000 at 10.11:1 contrast (WCAG AA passes).

Color values

HEX	#66BEE9
RGB	rgb(102, 190, 233)
HSL	hsl(200, 75%, 66%)
HSV	hsv(200, 56%, 91%)
CMYK	cmyk(56.2%, 18.5%, 0%, 8.6%)
CIE-LAB	lab(73.24, -14.40, -29.44)
CIE-LCH	lch(73.24, 32.78, 243.94°)
OKLab	oklab(76.33% -0.0651 -0.0821)
OKLCH	oklch(76.33% 0.105 231.6)
XYZ	xyz(38.5954, 45.5314, 83.8295)
Luminance	0.4553 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BEE9 #E99166

analogous

#66E9D3 #66BEE9 #667CE9

triadic

#66BEE9 #E966BE #BEE966

tetradic

#66BEE9 #D366E9 #E99166 #7CE966

square

#66BEE9 #D366E9 #E99166 #7CE966

split-complementary

#66BEE9 #E9667C #E9D366

monochromatic

#1B86BA #30A7E1 #66BEE9 #9CD5F1 #D1EBF8

Accessibility & contrast

On white

2.08

#66BEE9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

10.11

#66BEE9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BEE9

10.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BEE9	#FFFFFF	#000000	##000000
##66BEE9	1.00	2.08	10.11	10.11
#FFFFFF	2.08	1.00	21.00	21.00
#000000	10.11	21.00	1.00	1.00
##000000	10.11	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A9BCEB

Deuteranopia (green-blind)

#96AEE8

Tritanopia (blue-blind)

#00CACC

Achromatopsia (no color)

#B4B4B4

Design tokens & code

CSS

--color: #66bee9;
/* rgb */ color: rgb(102, 190, 233);
/* oklch */ color: oklch(76.3% 0.105 231.6);

Tailwind

colors: {
  custom: {
    50: '#9bd1f0',
    500: '#66bee9',
    950: '#000000',
  },
}

SCSS

$custom: #66bee9;
$custom-light: #9bd1f0;
$custom-dark: #000000;

JSON

{
  "hex": "#66bee9",
  "rgb": {
    "r": 102,
    "g": 190,
    "b": 233
  },
  "hsl": {
    "h": 199.695,
    "s": 74.857,
    "l": 65.686
  },
  "oklch": {
    "l": 0.76327,
    "c": 0.10476,
    "h": 231.6
  },
  "luminance": 0.45535
}

Semantic roles & 50–950 ramp

primary

#66BEE9

secondary

#EBCEC0

accent

#500ED7

background

#FAFCFE

surface

#F4F9FD

border

#CED2D5

text

#0F1416

muted

#7F8284

Preview Lab

Preview with #66BEE9

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

Preview Lab → · Contrast checker → · Palette generator →