#5666D8#5666D8

#5666D8 is a mid, vivid blue. Relative luminance 0.164; OKLCH L 55.9% C 0.174 H 273.4°. Best body text is #FFFFFF at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#5666D8
RGB	rgb(86, 102, 216)
HSL	hsl(233, 63%, 59%)
HSV	hsv(233, 60%, 85%)
CMYK	cmyk(60.2%, 52.8%, 0%, 15.3%)
CIE-LAB	lab(47.54, 28.28, -60.57)
CIE-LCH	lch(47.54, 66.85, 295.03°)
OKLab	oklab(55.87% 0.0103 -0.1736)
OKLCH	oklch(55.87% 0.174 273.4)
XYZ	xyz(20.9797, 16.4374, 67.0196)
Luminance	0.1644 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5666D8 #D8C856

analogous

#56A7D8 #5666D8 #8756D8

triadic

#5666D8 #D85666 #66D856

tetradic

#5666D8 #D856A7 #D8C856 #56D887

square

#5666D8 #D856A7 #D8C856 #56D887

split-complementary

#5666D8 #D88756 #A7D856

monochromatic

#222F92 #2D40C4 #5666D8 #8893E3 #B9C0EF

Accessibility & contrast

On white

4.90

#5666D8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.29

#5666D8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5666D8

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5666D8	#FFFFFF	#000000	##FFFFFF
##5666D8	1.00	4.90	4.29	4.90
#FFFFFF	4.90	1.00	21.00	1.00
#000000	4.29	21.00	1.00	21.00
##FFFFFF	4.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F77DC

Deuteranopia (green-blind)

#006BD6

Tritanopia (blue-blind)

#008195

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #5666d8;
/* rgb */ color: rgb(86, 102, 216);
/* oklch */ color: oklch(55.9% 0.174 273.4);

Tailwind

colors: {
  custom: {
    50: '#9191e5',
    500: '#5666d8',
    950: '#000000',
  },
}

SCSS

$custom: #5666d8;
$custom-light: #9191e5;
$custom-dark: #000000;

JSON

{
  "hex": "#5666d8",
  "rgb": {
    "r": 86,
    "g": 102,
    "b": 216
  },
  "hsl": {
    "h": 232.615,
    "s": 62.5,
    "l": 59.216
  },
  "oklch": {
    "l": 0.55868,
    "c": 0.17395,
    "h": 273.4
  },
  "luminance": 0.16439
}

Semantic roles & 50–950 ramp

primary

#5666D8

secondary

#DED8AB

accent

#D142E6

background

#F9F8FE

surface

#F2F0FC

border

#CCCBD5

text

#0E0C16

muted

#7E7D84

Preview Lab

Preview with #5666D8

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

Preview Lab → · Contrast checker → · Palette generator →