#66BCDD#66BCDD

#66BCDD is a light, moderate cyan. Relative luminance 0.440; OKLCH L 75.4% C 0.096 H 225.3°. Best body text is #000000 at 9.80:1 contrast (WCAG AA passes).

Color values

HEX	#66BCDD
RGB	rgb(102, 188, 221)
HSL	hsl(197, 64%, 63%)
HSV	hsv(197, 54%, 87%)
CMYK	cmyk(53.8%, 14.9%, 0%, 13.3%)
CIE-LAB	lab(72.23, -16.86, -24.47)
CIE-LCH	lch(72.23, 29.72, 235.44°)
OKLab	oklab(75.38% -0.0672 -0.068)
OKLCH	oklch(75.38% 0.096 225.3)
XYZ	xyz(36.5089, 44.0084, 74.9631)
Luminance	0.4401 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BCDD #DD8766

analogous

#66DDC2 #66BCDD #6680DD

triadic

#66BCDD #DD66BC #BCDD66

tetradic

#66BCDD #C266DD #DD8766 #80DD66

square

#66BCDD #C266DD #DD8766 #80DD66

split-complementary

#66BCDD #DD6680 #DDC266

monochromatic

#2481A4 #34A6D2 #66BCDD #98D2E8 #CAE8F3

Accessibility & contrast

On white

2.14

#66BCDD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.80

#66BCDD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BCDD

9.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BCDD	#FFFFFF	#000000	##000000
##66BCDD	1.00	2.14	9.80	9.80
#FFFFFF	2.14	1.00	21.00	21.00
#000000	9.80	21.00	1.00	1.00
##000000	9.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#AAB9DF

Deuteranopia (green-blind)

#99ABDD

Tritanopia (blue-blind)

#00C6C7

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #66bcdd;
/* rgb */ color: rgb(102, 188, 221);
/* oklch */ color: oklch(75.4% 0.096 225.3);

Tailwind

colors: {
  custom: {
    50: '#9ad0e7',
    500: '#66bcdd',
    950: '#000000',
  },
}

SCSS

$custom: #66bcdd;
$custom-light: #9ad0e7;
$custom-dark: #000000;

JSON

{
  "hex": "#66bcdd",
  "rgb": {
    "r": 102,
    "g": 188,
    "b": 221
  },
  "hsl": {
    "h": 196.639,
    "s": 63.636,
    "l": 63.333
  },
  "oklch": {
    "l": 0.7538,
    "c": 0.09561,
    "h": 225.3
  },
  "luminance": 0.44012
}

Semantic roles & 50–950 ramp

primary

#66BCDD

secondary

#E5C6BA

accent

#4B1ACB

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0F1416

muted

#7E8284

Preview Lab

Preview with #66BCDD

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

Preview Lab → · Contrast checker → · Palette generator →