#5566CB#5566CB

#5566CB is a mid, vivid blue. Relative luminance 0.157; OKLCH L 54.9% C 0.156 H 273.0°. Best body text is #FFFFFF at 5.06:1 contrast (WCAG AA passes).

Color values

HEX	#5566CB
RGB	rgb(85, 102, 203)
HSL	hsl(231, 53%, 56%)
HSV	hsv(231, 58%, 80%)
CMYK	cmyk(58.1%, 49.8%, 0%, 20.4%)
CIE-LAB	lab(46.64, 23.76, -54.61)
CIE-LCH	lch(46.64, 59.55, 293.52°)
OKLab	oklab(54.9% 0.0082 -0.1561)
OKLCH	oklch(54.9% 0.156 273)
XYZ	xyz(19.2736, 15.7444, 58.5116)
Luminance	0.1575 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#5566CB #CBBA55

analogous

#55A1CB #5566CB #7F55CB

triadic

#5566CB #CB5566 #66CB55

tetradic

#5566CB #CB55A1 #CBBA55 #55CB7F

square

#5566CB #CB55A1 #CBBA55 #55CB7F

split-complementary

#5566CB #CB7F55 #A1CB55

monochromatic

#27337F #3546AE #5566CB #8490D9 #B3BAE8

Accessibility & contrast

On white

5.06

#5566CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.15

#5566CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #5566CB

5.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##5566CB	#FFFFFF	#000000	##FFFFFF
##5566CB	1.00	5.06	4.15	5.06
#FFFFFF	5.06	1.00	21.00	1.00
#000000	4.15	21.00	1.00	21.00
##FFFFFF	5.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3274CF

Deuteranopia (green-blind)

#1C6AC9

Tritanopia (blue-blind)

#007D8F

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #5566cb;
/* rgb */ color: rgb(85, 102, 203);
/* oklch */ color: oklch(54.9% 0.156 273.0);

Tailwind

colors: {
  custom: {
    50: '#8f91db',
    500: '#5566cb',
    950: '#000000',
  },
}

SCSS

$custom: #5566cb;
$custom-light: #8f91db;
$custom-dark: #000000;

JSON

{
  "hex": "#5566cb",
  "rgb": {
    "r": 85,
    "g": 102,
    "b": 203
  },
  "hsl": {
    "h": 231.356,
    "s": 53.153,
    "l": 56.471
  },
  "oklch": {
    "l": 0.54899,
    "c": 0.15633,
    "h": 273
  },
  "luminance": 0.15746
}

Semantic roles & 50–950 ramp

primary

#5566CB

secondary

#D6CFA6

accent

#C84BDD

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0D0C15

muted

#7E7D83

Preview Lab

Preview with #5566CB

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

Preview Lab → · Contrast checker → · Palette generator →