#5566CC#5566CC

#5566CC is a mid, vivid blue. Relative luminance 0.158; OKLCH L 55.0% C 0.158 H 273.0°. Best body text is #FFFFFF at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#5566CC
RGB	rgb(85, 102, 204)
HSL	hsl(231, 54%, 57%)
HSV	hsv(231, 58%, 80%)
CMYK	cmyk(58.3%, 50%, 0%, 20%)
CIE-LAB	lab(46.70, 24.09, -55.08)
CIE-LCH	lch(46.70, 60.12, 293.63°)
OKLab	oklab(54.97% 0.0083 -0.1575)
OKLCH	oklch(54.97% 0.158 273)
XYZ	xyz(19.3932, 15.7922, 59.1413)
Luminance	0.1579 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5566CC #CCBB55

analogous

#55A1CC #5566CC #8055CC

triadic

#5566CC #CC5566 #66CC55

tetradic

#5566CC #CC55A1 #CCBB55 #55CC80

square

#5566CC #CC55A1 #CCBB55 #55CC80

split-complementary

#5566CC #CC8055 #A1CC55

monochromatic

#263380 #3546AF #5566CC #8490DA #B3BBE8

Accessibility & contrast

On white

5.05

#5566CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.16

#5566CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5566CC

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5566CC	#FFFFFF	#000000	##FFFFFF
##5566CC	1.00	5.05	4.16	5.05
#FFFFFF	5.05	1.00	21.00	1.00
#000000	4.16	21.00	1.00	21.00
##FFFFFF	5.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3074D0

Deuteranopia (green-blind)

#1A6ACA

Tritanopia (blue-blind)

#007D8F

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #5566cc;
/* rgb */ color: rgb(85, 102, 204);
/* oklch */ color: oklch(55.0% 0.158 273.0);

Tailwind

colors: {
  custom: {
    50: '#8f91dc',
    500: '#5566cc',
    950: '#000000',
  },
}

SCSS

$custom: #5566cc;
$custom-light: #8f91dc;
$custom-dark: #000000;

JSON

{
  "hex": "#5566cc",
  "rgb": {
    "r": 85,
    "g": 102,
    "b": 204
  },
  "hsl": {
    "h": 231.429,
    "s": 53.846,
    "l": 56.667
  },
  "oklch": {
    "l": 0.54967,
    "c": 0.15773,
    "h": 273
  },
  "luminance": 0.15794
}

Semantic roles & 50–950 ramp

primary

#5566CC

secondary

#D7D0A6

accent

#C84BDD

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0D0C15

muted

#7E7D83

Preview Lab

Preview with #5566CC

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

Preview Lab → · Contrast checker → · Palette generator →