#5666BF#5666BF

#5666BF is a mid, vivid blue. Relative luminance 0.152; OKLCH L 54.2% C 0.139 H 273.2°. Best body text is #FFFFFF at 5.19:1 contrast (WCAG AA passes).

Color values

HEX	#5666BF
RGB	rgb(86, 102, 191)
HSL	hsl(231, 45%, 54%)
HSV	hsv(231, 55%, 75%)
CMYK	cmyk(55%, 46.6%, 0%, 25.1%)
CIE-LAB	lab(45.96, 20.00, -48.77)
CIE-LCH	lch(45.96, 52.71, 292.30°)
OKLab	oklab(54.17% 0.0078 -0.1389)
OKLCH	oklch(54.17% 0.139 273.2)
XYZ	xyz(17.9900, 15.2415, 51.2740)
Luminance	0.1524 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5666BF #BFAF56

analogous

#569BBF #5666BF #7B56BF

triadic

#5666BF #BF5666 #66BF56

tetradic

#5666BF #BF569B #BFAF56 #56BF7B

square

#5666BF #BF569B #BFAF56 #56BF7B

split-complementary

#5666BF #BF7B56 #9BBF56

monochromatic

#2A3570 #3B4A9D #5666BF #828ED0 #AFB6E1

Accessibility & contrast

On white

5.19

#5666BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.05

#5666BF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5666BF

5.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5666BF	#FFFFFF	#000000	##FFFFFF
##5666BF	1.00	5.19	4.05	5.19
#FFFFFF	5.19	1.00	21.00	1.00
#000000	4.05	21.00	1.00	21.00
##FFFFFF	5.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D72C2

Deuteranopia (green-blind)

#3069BD

Tritanopia (blue-blind)

#1F7A89

Achromatopsia (no color)

#6D6D6D

Design tokens & code

CSS

--color: #5666bf;
/* rgb */ color: rgb(86, 102, 191);
/* oklch */ color: oklch(54.2% 0.139 273.2);

Tailwind

colors: {
  custom: {
    50: '#8d91d3',
    500: '#5666bf',
    950: '#000000',
  },
}

SCSS

$custom: #5666bf;
$custom-light: #8d91d3;
$custom-dark: #000000;

JSON

{
  "hex": "#5666bf",
  "rgb": {
    "r": 86,
    "g": 102,
    "b": 191
  },
  "hsl": {
    "h": 230.857,
    "s": 45.064,
    "l": 54.314
  },
  "oklch": {
    "l": 0.54167,
    "c": 0.13915,
    "h": 273.2
  },
  "luminance": 0.15243
}

Semantic roles & 50–950 ramp

primary

#5666BF

secondary

#CFC8A2

accent

#C153D5

background

#F9F8FD

surface

#F1F0FA

border

#CBCBD3

text

#0D0C14

muted

#7E7D83

Preview Lab

Preview with #5666BF

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

Preview Lab → · Contrast checker → · Palette generator →