#66BCD5#66BCD5

#66BCD5 is a light, moderate cyan. Relative luminance 0.436; OKLCH L 75.1% C 0.090 H 219.0°. Best body text is #000000 at 9.72:1 contrast (WCAG AA passes).

Color values

HEX	#66BCD5
RGB	rgb(102, 188, 213)
HSL	hsl(194, 57%, 62%)
HSV	hsv(194, 52%, 84%)
CMYK	cmyk(52.1%, 11.7%, 0%, 16.5%)
CIE-LAB	lab(71.96, -19.14, -20.54)
CIE-LCH	lch(71.96, 28.08, 227.02°)
OKLab	oklab(75.07% -0.0703 -0.0569)
OKLCH	oklch(75.07% 0.09 219)
XYZ	xyz(35.4683, 43.5922, 69.4829)
Luminance	0.4360 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BCD5 #D57F66

analogous

#66D5B7 #66BCD5 #6685D5

triadic

#66BCD5 #D566BC #BCD566

tetradic

#66BCD5 #B766D5 #D57F66 #85D566

square

#66BCD5 #B766D5 #D57F66 #85D566

split-complementary

#66BCD5 #D56685 #D5B766

monochromatic

#297E97 #37A7C7 #66BCD5 #96D1E2 #C6E6EF

Accessibility & contrast

On white

2.16

#66BCD5 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.72

#66BCD5 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BCD5

9.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BCD5	#FFFFFF	#000000	##000000
##66BCD5	1.00	2.16	9.72	9.72
#FFFFFF	2.16	1.00	21.00	21.00
#000000	9.72	21.00	1.00	1.00
##000000	9.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#ACB8D6

Deuteranopia (green-blind)

#9BABD5

Tritanopia (blue-blind)

#18C5C4

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #66bcd5;
/* rgb */ color: rgb(102, 188, 213);
/* oklch */ color: oklch(75.1% 0.090 219.0);

Tailwind

colors: {
  custom: {
    50: '#99d0e2',
    500: '#66bcd5',
    950: '#000000',
  },
}

SCSS

$custom: #66bcd5;
$custom-light: #99d0e2;
$custom-dark: #000000;

JSON

{
  "hex": "#66bcd5",
  "rgb": {
    "r": 102,
    "g": 188,
    "b": 213
  },
  "hsl": {
    "h": 193.514,
    "s": 56.923,
    "l": 61.765
  },
  "oklch": {
    "l": 0.75065,
    "c": 0.09039,
    "h": 219
  },
  "luminance": 0.43595
}

Semantic roles & 50–950 ramp

primary

#66BCD5

secondary

#E0C0B7

accent

#4621C4

background

#F9FCFD

surface

#F2F9FB

border

#CCD2D4

text

#0F1415

muted

#7E8283

Preview Lab

Preview with #66BCD5

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

Preview Lab → · Contrast checker → · Palette generator →