#66BCD2#66BCD2

#66BCD2 is a light, moderate cyan. Relative luminance 0.434; OKLCH L 75.0% C 0.089 H 216.4°. Best body text is #000000 at 9.69:1 contrast (WCAG AA passes).

Color values

HEX	#66BCD2
RGB	rgb(102, 188, 210)
HSL	hsl(192, 55%, 61%)
HSV	hsv(192, 51%, 82%)
CMYK	cmyk(51.4%, 10.5%, 0%, 17.6%)
CIE-LAB	lab(71.85, -19.99, -19.06)
CIE-LCH	lch(71.85, 27.62, 223.64°)
OKLab	oklab(74.95% -0.0714 -0.0527)
OKLCH	oklch(74.95% 0.089 216.4)
XYZ	xyz(35.0911, 43.4413, 67.4961)
Luminance	0.4344 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BCD2 #D27C66

analogous

#66D2B2 #66BCD2 #6686D2

triadic

#66BCD2 #D266BC #BCD266

tetradic

#66BCD2 #B266D2 #D27C66 #86D266

square

#66BCD2 #B266D2 #D27C66 #86D266

split-complementary

#66BCD2 #D26686 #D2B266

monochromatic

#2B7D93 #39A6C2 #66BCD2 #95D1E0 #C5E5EE

Accessibility & contrast

On white

2.17

#66BCD2 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.69

#66BCD2 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BCD2

9.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BCD2	#FFFFFF	#000000	##000000
##66BCD2	1.00	2.17	9.69	9.69
#FFFFFF	2.17	1.00	21.00	21.00
#000000	9.69	21.00	1.00	1.00
##000000	9.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ADB7D3

Deuteranopia (green-blind)

#9CABD2

Tritanopia (blue-blind)

#1EC4C3

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #66bcd2;
/* rgb */ color: rgb(102, 188, 210);
/* oklch */ color: oklch(75.0% 0.089 216.4);

Tailwind

colors: {
  custom: {
    50: '#99d0df',
    500: '#66bcd2',
    950: '#000000',
  },
}

SCSS

$custom: #66bcd2;
$custom-light: #99d0df;
$custom-dark: #000000;

JSON

{
  "hex": "#66bcd2",
  "rgb": {
    "r": 102,
    "g": 188,
    "b": 210
  },
  "hsl": {
    "h": 192.222,
    "s": 54.545,
    "l": 61.176
  },
  "oklch": {
    "l": 0.7495,
    "c": 0.08876,
    "h": 216.4
  },
  "luminance": 0.43444
}

Semantic roles & 50–950 ramp

primary

#66BCD2

secondary

#DEBEB6

accent

#4423C2

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0E1415

muted

#7E8283

Preview Lab

Preview with #66BCD2

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

Preview Lab → · Contrast checker → · Palette generator →