#66B4FB#66B4FB

#66B4FB is a light, vivid cyan. Relative luminance 0.424; OKLCH L 74.9% C 0.129 H 247.8°. Best body text is #000000 at 9.49:1 contrast (WCAG AA passes).

Color values

HEX	#66B4FB
RGB	rgb(102, 180, 251)
HSL	hsl(209, 95%, 69%)
HSV	hsv(209, 59%, 98%)
CMYK	cmyk(59.4%, 28.3%, 0%, 1.6%)
CIE-LAB	lab(71.17, -3.51, -42.40)
CIE-LCH	lch(71.17, 42.55, 265.27°)
OKLab	oklab(74.92% -0.0487 -0.1194)
OKLCH	oklch(74.92% 0.129 247.8)
XYZ	xyz(39.2070, 42.4287, 97.3715)
Luminance	0.4243 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#66B4FB #FBAD66

analogous

#66FBF8 #66B4FB #666AFB

triadic

#66B4FB #FB66B4 #B4FB66

tetradic

#66B4FB #F866FB #FBAD66 #6AFB66

square

#66B4FB #F866FB #FBAD66 #6AFB66

split-complementary

#66B4FB #FB666A #FBF866

monochromatic

#0678E1 #2A97F9 #66B4FB #A2D1FD #DDEEFE

Accessibility & contrast

On white

2.21

#66B4FB on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

9.49

#66B4FB on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #66B4FB

9.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##66B4FB	#FFFFFF	#000000	##000000
##66B4FB	1.00	2.21	9.49	9.49
#FFFFFF	2.21	1.00	21.00	21.00
#000000	9.49	21.00	1.00	1.00
##000000	9.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#96B6FE

Deuteranopia (green-blind)

#82A8FA

Tritanopia (blue-blind)

#00C5CD

Achromatopsia (no color)

#AEAEAE

Design tokens & code

CSS

--color: #66b4fb;
/* rgb */ color: rgb(102, 180, 251);
/* oklch */ color: oklch(74.9% 0.129 247.8);

Tailwind

colors: {
  custom: {
    50: '#9dcafd',
    500: '#66b4fb',
    950: '#000000',
  },
}

SCSS

$custom: #66b4fb;
$custom-light: #9dcafd;
$custom-dark: #000000;

JSON

{
  "hex": "#66b4fb",
  "rgb": {
    "r": 102,
    "g": 180,
    "b": 251
  },
  "hsl": {
    "h": 208.591,
    "s": 94.904,
    "l": 69.216
  },
  "oklch": {
    "l": 0.74923,
    "c": 0.12892,
    "h": 247.8
  },
  "luminance": 0.42432
}

Semantic roles & 50–950 ramp

primary

#66B4FB

secondary

#F4DDC9

accent

#6D00E6

background

#FAFCFF

surface

#F4F8FF

border

#CED1D7

text

#0F1317

muted

#7F8285

Preview Lab

Preview with #66B4FB

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

Preview Lab → · Contrast checker → · Palette generator →