#3566CC#3566CC

#3566CC is a mid, vivid blue. Relative luminance 0.146; OKLCH L 53.3% C 0.167 H 262.8°. Best body text is #FFFFFF at 5.35:1 contrast (WCAG AA passes).

Color values

HEX	#3566CC
RGB	rgb(53, 102, 204)
HSL	hsl(221, 60%, 50%)
HSV	hsv(221, 74%, 80%)
CMYK	cmyk(74%, 50%, 0%, 20%)
CIE-LAB	lab(45.11, 18.96, -57.73)
CIE-LCH	lch(45.11, 60.76, 288.18°)
OKLab	oklab(53.33% -0.021 -0.1659)
OKLCH	oklch(53.33% 0.167 262.8)
XYZ	xyz(17.1148, 14.6174, 59.0345)
Luminance	0.1462 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3566CC #CC9B35

analogous

#35B1CC #3566CC #4F35CC

triadic

#3566CC #CC3566 #66CC35

tetradic

#3566CC #CC35B1 #CC9B35 #35CC4F

square

#3566CC #CC35B1 #CC9B35 #35CC4F

split-complementary

#3566CC #CC4F35 #B1CC35

monochromatic

#1B356B #274D9C #3566CC #668BD8 #97B0E5

Accessibility & contrast

On white

5.35

#3566CC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.92

#3566CC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3566CC

5.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3566CC	#FFFFFF	#000000	##FFFFFF
##3566CC	1.00	5.35	3.92	5.35
#FFFFFF	5.35	1.00	21.00	1.00
#000000	3.92	21.00	1.00	21.00
##FFFFFF	5.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2872D0

Deuteranopia (green-blind)

#0064CA

Tritanopia (blue-blind)

#007E8F

Achromatopsia (no color)

#6B6B6B

Design tokens & code

CSS

--color: #3566cc;
/* rgb */ color: rgb(53, 102, 204);
/* oklch */ color: oklch(53.3% 0.167 262.8);

Tailwind

colors: {
  custom: {
    50: '#8091dc',
    500: '#3566cc',
    950: '#000000',
  },
}

SCSS

$custom: #3566cc;
$custom-light: #8091dc;
$custom-dark: #000000;

JSON

{
  "hex": "#3566cc",
  "rgb": {
    "r": 53,
    "g": 102,
    "b": 204
  },
  "hsl": {
    "h": 220.53,
    "s": 59.684,
    "l": 50.392
  },
  "oklch": {
    "l": 0.53325,
    "c": 0.16728,
    "h": 262.8
  },
  "luminance": 0.14619
}

Semantic roles & 50–950 ramp

primary

#3566CC

secondary

#D0BA8D

accent

#B045E3

background

#F8F8FD

surface

#F0F0FB

border

#CBCBD4

text

#0C0C15

muted

#7D7D83

Preview Lab

Preview with #3566CC

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

Preview Lab → · Contrast checker → · Palette generator →