#66B3DA#66B3DA

#66B3DA is a light, moderate cyan. Relative luminance 0.401; OKLCH L 73.2% C 0.095 H 232.1°. Best body text is #000000 at 9.03:1 contrast (WCAG AA passes).

Color values

HEX	#66B3DA
RGB	rgb(102, 179, 218)
HSL	hsl(200, 61%, 63%)
HSV	hsv(200, 53%, 85%)
CMYK	cmyk(53.2%, 17.9%, 0%, 14.5%)
CIE-LAB	lab(69.56, -12.98, -26.94)
CIE-LCH	lch(69.56, 29.90, 244.27°)
OKLab	oklab(73.21% -0.0583 -0.0749)
OKLCH	oklch(73.21% 0.095 232.1)
XYZ	xyz(34.2498, 40.1240, 72.2559)
Luminance	0.4013 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B3DA #DA8D66

analogous

#66DAC7 #66B3DA #6679DA

triadic

#66B3DA #DA66B3 #B3DA66

tetradic

#66B3DA #C766DA #DA8D66 #79DA66

square

#66B3DA #C766DA #DA8D66 #79DA66

split-complementary

#66B3DA #DA6679 #DAC766

monochromatic

#26779F #359BCE #66B3DA #97CBE6 #C9E4F2

Accessibility & contrast

On white

2.33

#66B3DA on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.03

#66B3DA on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B3DA

9.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B3DA	#FFFFFF	#000000	##000000
##66B3DA	1.00	2.33	9.03	9.03
#FFFFFF	2.33	1.00	21.00	21.00
#000000	9.03	21.00	1.00	1.00
##000000	9.03	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#A0B1DC

Deuteranopia (green-blind)

#90A4D9

Tritanopia (blue-blind)

#14BEC0

Achromatopsia (no color)

#AAAAAA

Design tokens & code

CSS

--color: #66b3da;
/* rgb */ color: rgb(102, 179, 218);
/* oklch */ color: oklch(73.2% 0.095 232.1);

Tailwind

colors: {
  custom: {
    50: '#99c9e5',
    500: '#66b3da',
    950: '#000000',
  },
}

SCSS

$custom: #66b3da;
$custom-light: #99c9e5;
$custom-dark: #000000;

JSON

{
  "hex": "#66b3da",
  "rgb": {
    "r": 102,
    "g": 179,
    "b": 218
  },
  "hsl": {
    "h": 200.172,
    "s": 61.053,
    "l": 62.745
  },
  "oklch": {
    "l": 0.73214,
    "c": 0.09495,
    "h": 232.1
  },
  "luminance": 0.40127
}

Semantic roles & 50–950 ramp

primary

#66B3DA

secondary

#E3C7B9

accent

#571DC9

background

#F9FCFE

surface

#F2F8FC

border

#CCD1D5

text

#0F1315

muted

#7E8284

Preview Lab

Preview with #66B3DA

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

Preview Lab → · Contrast checker → · Palette generator →