#66B4FD#66B4FD

#66B4FD is a light, vivid cyan. Relative luminance 0.426; OKLCH L 75.0% C 0.131 H 248.5°. Best body text is #000000 at 9.51:1 contrast (WCAG AA passes).

Color values

HEX	#66B4FD
RGB	rgb(102, 180, 253)
HSL	hsl(209, 97%, 70%)
HSV	hsv(209, 60%, 99%)
CMYK	cmyk(59.7%, 28.9%, 0%, 0.8%)
CIE-LAB	lab(71.25, -2.89, -43.35)
CIE-LCH	lch(71.25, 43.44, 266.19°)
OKLab	oklab(75.02% -0.0481 -0.1221)
OKLCH	oklch(75.02% 0.131 248.5)
XYZ	xyz(39.5239, 42.5555, 99.0406)
Luminance	0.4256 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B4FD #FDAF66

analogous

#66FDFB #66B4FD #6669FD

triadic

#66B4FD #FD66B4 #B4FD66

tetradic

#66B4FD #FB66FD #FDAF66 #69FD66

square

#66B4FD #FB66FD #FDAF66 #69FD66

split-complementary

#66B4FD #FD6669 #FDFB66

monochromatic

#0378E6 #2A96FC #66B4FD #A2D2FE #DFEFFF

Accessibility & contrast

On white

2.21

#66B4FD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.51

#66B4FD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B4FD

9.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B4FD	#FFFFFF	#000000	##000000
##66B4FD	1.00	2.21	9.51	9.51
#FFFFFF	2.21	1.00	21.00	21.00
#000000	9.51	21.00	1.00	1.00
##000000	9.51	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#95B7FF

Deuteranopia (green-blind)

#81A8FC

Tritanopia (blue-blind)

#00C5CE

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #66b4fd;
/* rgb */ color: rgb(102, 180, 253);
/* oklch */ color: oklch(75.0% 0.131 248.5);

Tailwind

colors: {
  custom: {
    50: '#9dcafe',
    500: '#66b4fd',
    950: '#000000',
  },
}

SCSS

$custom: #66b4fd;
$custom-light: #9dcafe;
$custom-dark: #000000;

JSON

{
  "hex": "#66b4fd",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 253
  },
  "hsl": {
    "h": 209.007,
    "s": 97.419,
    "l": 69.608
  },
  "oklch": {
    "l": 0.7502,
    "c": 0.13124,
    "h": 248.5
  },
  "luminance": 0.42559
}

Semantic roles & 50–950 ramp

primary

#66B4FD

secondary

#F5DFCA

accent

#6F00E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1318

muted

#7F8286

Preview Lab

Preview with #66B4FD

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

Preview Lab → · Contrast checker → · Palette generator →