#66BCDF#66BCDF

#66BCDF is a light, moderate cyan. Relative luminance 0.441; OKLCH L 75.5% C 0.097 H 226.8°. Best body text is #000000 at 9.82:1 contrast (WCAG AA passes).

Color values

HEX	#66BCDF
RGB	rgb(102, 188, 223)
HSL	hsl(197, 65%, 64%)
HSV	hsv(197, 54%, 87%)
CMYK	cmyk(54.3%, 15.7%, 0%, 12.5%)
CIE-LAB	lab(72.31, -16.28, -25.45)
CIE-LCH	lch(72.31, 30.21, 237.39°)
OKLab	oklab(75.46% -0.0665 -0.0707)
OKLCH	oklch(75.46% 0.097 226.8)
XYZ	xyz(36.7769, 44.1157, 76.3748)
Luminance	0.4412 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BCDF #DF8966

analogous

#66DFC5 #66BCDF #667FDF

triadic

#66BCDF #DF66BC #BCDF66

tetradic

#66BCDF #C566DF #DF8966 #7FDF66

square

#66BCDF #C566DF #DF8966 #7FDF66

split-complementary

#66BCDF #DF667F #DFC566

monochromatic

#2381A8 #33A6D4 #66BCDF #99D2EA #CBE8F4

Accessibility & contrast

On white

2.14

#66BCDF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.82

#66BCDF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BCDF

9.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BCDF	#FFFFFF	#000000	##000000
##66BCDF	1.00	2.14	9.82	9.82
#FFFFFF	2.14	1.00	21.00	21.00
#000000	9.82	21.00	1.00	1.00
##000000	9.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A9B9E1

Deuteranopia (green-blind)

#98ACDF

Tritanopia (blue-blind)

#00C6C7

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #66bcdf;
/* rgb */ color: rgb(102, 188, 223);
/* oklch */ color: oklch(75.5% 0.097 226.8);

Tailwind

colors: {
  custom: {
    50: '#9ad0e9',
    500: '#66bcdf',
    950: '#000000',
  },
}

SCSS

$custom: #66bcdf;
$custom-light: #9ad0e9;
$custom-dark: #000000;

JSON

{
  "hex": "#66bcdf",
  "rgb": {
    "r": 102,
    "g": 188,
    "b": 223
  },
  "hsl": {
    "h": 197.355,
    "s": 65.405,
    "l": 63.725
  },
  "oklch": {
    "l": 0.75461,
    "c": 0.09709,
    "h": 226.8
  },
  "luminance": 0.44119
}

Semantic roles & 50–950 ramp

primary

#66BCDF

secondary

#E6C7BB

accent

#4D18CD

background

#FAFCFE

surface

#F3F9FC

border

#CDD2D5

text

#0F1416

muted

#7F8284

Preview Lab

Preview with #66BCDF

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

Preview Lab → · Contrast checker → · Palette generator →