#66BBDD#66BBDD

#66BBDD is a light, moderate cyan. Relative luminance 0.436; OKLCH L 75.2% C 0.096 H 226.3°. Best body text is #000000 at 9.72:1 contrast (WCAG AA passes).

Color values

HEX	#66BBDD
RGB	rgb(102, 187, 221)
HSL	hsl(197, 64%, 63%)
HSV	hsv(197, 54%, 87%)
CMYK	cmyk(53.8%, 15.4%, 0%, 13.3%)
CIE-LAB	lab(71.95, -16.34, -24.91)
CIE-LCH	lch(71.95, 29.79, 236.74°)
OKLab	oklab(75.15% -0.0661 -0.0692)
OKLCH	oklch(75.15% 0.096 226.3)
XYZ	xyz(36.2960, 43.5827, 74.8922)
Luminance	0.4359 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66BBDD #DD8866

analogous

#66DDC3 #66BBDD #667FDD

triadic

#66BBDD #DD66BB #BBDD66

tetradic

#66BBDD #C366DD #DD8866 #7FDD66

square

#66BBDD #C366DD #DD8866 #7FDD66

split-complementary

#66BBDD #DD667F #DDC366

monochromatic

#2480A4 #34A5D2 #66BBDD #98D1E8 #CAE8F3

Accessibility & contrast

On white

2.16

#66BBDD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.72

#66BBDD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66BBDD

9.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66BBDD	#FFFFFF	#000000	##000000
##66BBDD	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)

#A9B8DF

Deuteranopia (green-blind)

#97ABDD

Tritanopia (blue-blind)

#00C5C6

Achromatopsia (no color)

#B0B0B0

Design tokens & code

CSS

--color: #66bbdd;
/* rgb */ color: rgb(102, 187, 221);
/* oklch */ color: oklch(75.2% 0.096 226.3);

Tailwind

colors: {
  custom: {
    50: '#9acfe7',
    500: '#66bbdd',
    950: '#000000',
  },
}

SCSS

$custom: #66bbdd;
$custom-light: #9acfe7;
$custom-dark: #000000;

JSON

{
  "hex": "#66bbdd",
  "rgb": {
    "r": 102,
    "g": 187,
    "b": 221
  },
  "hsl": {
    "h": 197.143,
    "s": 63.636,
    "l": 63.333
  },
  "oklch": {
    "l": 0.75153,
    "c": 0.09572,
    "h": 226.3
  },
  "luminance": 0.43586
}

Semantic roles & 50–950 ramp

primary

#66BBDD

secondary

#E5C6BA

accent

#4D1ACB

background

#F9FCFE

surface

#F2F9FC

border

#CCD2D5

text

#0F1316

muted

#7E8284

Preview Lab

Preview with #66BBDD

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

Preview Lab → · Contrast checker → · Palette generator →