#66CCE9#66CCE9

#66CCE9 is a light, moderate cyan. Relative luminance 0.519; OKLCH L 79.5% C 0.103 H 219.0°. Best body text is #000000 at 11.38:1 contrast (WCAG AA passes).

Color values

HEX	#66CCE9
RGB	rgb(102, 204, 233)
HSL	hsl(193, 75%, 66%)
HSV	hsv(193, 56%, 91%)
CMYK	cmyk(56.2%, 12.4%, 0%, 8.6%)
CIE-LAB	lab(77.21, -21.63, -23.36)
CIE-LCH	lch(77.21, 31.84, 227.20°)
OKLab	oklab(79.5% -0.0802 -0.0648)
OKLCH	oklch(79.5% 0.103 219)
XYZ	xyz(41.7745, 51.8897, 84.8892)
Luminance	0.5189 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66CCE9 #E98366

analogous

#66E9C4 #66CCE9 #668BE9

triadic

#66CCE9 #E966CC #CCE966

tetradic

#66CCE9 #C466E9 #E98366 #8BE966

square

#66CCE9 #C466E9 #E98366 #8BE966

split-complementary

#66CCE9 #E9668B #E9C466

monochromatic

#1B97BA #30BAE1 #66CCE9 #9CDEF1 #D1F0F8

Accessibility & contrast

On white

1.85

#66CCE9 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

11.38

#66CCE9 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66CCE9

11.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66CCE9	#FFFFFF	#000000	##000000
##66CCE9	1.00	1.85	11.38	11.38
#FFFFFF	1.85	1.00	21.00	21.00
#000000	11.38	21.00	1.00	1.00
##000000	11.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#BAC7EB

Deuteranopia (green-blind)

#A6B8E9

Tritanopia (blue-blind)

#00D6D5

Achromatopsia (no color)

#BFBFBF

Design tokens & code

CSS

--color: #66cce9;
/* rgb */ color: rgb(102, 204, 233);
/* oklch */ color: oklch(79.5% 0.103 219.0);

Tailwind

colors: {
  custom: {
    50: '#9cdbf0',
    500: '#66cce9',
    950: '#000000',
  },
}

SCSS

$custom: #66cce9;
$custom-light: #9cdbf0;
$custom-dark: #000000;

JSON

{
  "hex": "#66cce9",
  "rgb": {
    "r": 102,
    "g": 204,
    "b": 233
  },
  "hsl": {
    "h": 193.282,
    "s": 74.857,
    "l": 65.686
  },
  "oklch": {
    "l": 0.79498,
    "c": 0.1031,
    "h": 219
  },
  "luminance": 0.51894
}

Semantic roles & 50–950 ramp

primary

#66CCE9

secondary

#B9563A

accent

#3B0ED7

background

#FCFEFF

surface

#F6FCFE

border

#D0D5D6

text

#0F1516

muted

#808485

Preview Lab

Preview with #66CCE9

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

Preview Lab → · Contrast checker → · Palette generator →