#66BBDF#66BBDF

#66BBDF is a light, moderate cyan. Relative luminance 0.437; OKLCH L 75.2% C 0.097 H 227.7°. Best body text is #000000 at 9.74:1 contrast (WCAG AA passes).

Color values

HEX	#66BBDF
RGB	rgb(102, 187, 223)
HSL	hsl(198, 65%, 64%)
HSV	hsv(198, 54%, 87%)
CMYK	cmyk(54.3%, 16.1%, 0%, 12.5%)
CIE-LAB	lab(72.02, -15.76, -25.89)
CIE-LCH	lch(72.02, 30.31, 238.67°)
OKLab	oklab(75.23% -0.0654 -0.072)
OKLCH	oklch(75.23% 0.097 227.7)
XYZ	xyz(36.5640, 43.6899, 76.3039)
Luminance	0.4369 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BBDF #DF8A66

analogous

#66DFC6 #66BBDF #667EDF

triadic

#66BBDF #DF66BB #BBDF66

tetradic

#66BBDF #C666DF #DF8A66 #7EDF66

square

#66BBDF #C666DF #DF8A66 #7EDF66

split-complementary

#66BBDF #DF667E #DFC666

monochromatic

#2380A8 #33A5D4 #66BBDF #99D1EA #CBE8F4

Accessibility & contrast

On white

2.16

#66BBDF on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.74

#66BBDF on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BBDF

9.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BBDF	#FFFFFF	#000000	##000000
##66BBDF	1.00	2.16	9.74	9.74
#FFFFFF	2.16	1.00	21.00	21.00
#000000	9.74	21.00	1.00	1.00
##000000	9.74	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A8B8E1

Deuteranopia (green-blind)

#97ABDF

Tritanopia (blue-blind)

#00C5C7

Achromatopsia (no color)

#B1B1B1

Design tokens & code

CSS

--color: #66bbdf;
/* rgb */ color: rgb(102, 187, 223);
/* oklch */ color: oklch(75.2% 0.097 227.7);

Tailwind

colors: {
  custom: {
    50: '#9acfe9',
    500: '#66bbdf',
    950: '#000000',
  },
}

SCSS

$custom: #66bbdf;
$custom-light: #9acfe9;
$custom-dark: #000000;

JSON

{
  "hex": "#66bbdf",
  "rgb": {
    "r": 102,
    "g": 187,
    "b": 223
  },
  "hsl": {
    "h": 197.851,
    "s": 65.405,
    "l": 63.725
  },
  "oklch": {
    "l": 0.75234,
    "c": 0.09725,
    "h": 227.7
  },
  "luminance": 0.43693
}

Semantic roles & 50–950 ramp

primary

#66BBDF

secondary

#E6C8BB

accent

#4E18CD

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0F1316

muted

#7E8284

Preview Lab

Preview with #66BBDF

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

Preview Lab → · Contrast checker → · Palette generator →