#3566BB#3566BB

#3566BB is a mid, vivid blue. Relative luminance 0.138; OKLCH L 52.1% C 0.144 H 260.6°. Best body text is #FFFFFF at 5.57:1 contrast (WCAG AA passes).

Color values

HEX	#3566BB
RGB	rgb(53, 102, 187)
HSL	hsl(218, 56%, 47%)
HSV	hsv(218, 72%, 73%)
CMYK	cmyk(71.7%, 45.5%, 0%, 26.7%)
CIE-LAB	lab(44.01, 12.64, -49.67)
CIE-LCH	lch(44.01, 51.25, 284.28°)
OKLab	oklab(52.14% -0.0236 -0.1422)
OKLCH	oklch(52.14% 0.144 260.6)
XYZ	xyz(15.1860, 13.8459, 48.8763)
Luminance	0.1385 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3566BB #BB8A35

analogous

#35A9BB #3566BB #4735BB

triadic

#3566BB #BB3566 #66BB35

tetradic

#3566BB #BB35A9 #BB8A35 #35BB47

square

#3566BB #BB35A9 #BB8A35 #35BB47

split-complementary

#3566BB #BB4735 #A9BB35

monochromatic

#1A325C #274C8B #3566BB #5C87D1 #8CAADE

Accessibility & contrast

On white

5.57

#3566BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.77

#3566BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3566BB

5.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3566BB	#FFFFFF	#000000	##FFFFFF
##3566BB	1.00	5.57	3.77	5.57
#FFFFFF	5.57	1.00	21.00	1.00
#000000	3.77	21.00	1.00	21.00
##FFFFFF	5.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B6FBE

Deuteranopia (green-blind)

#2062B9

Tritanopia (blue-blind)

#007A87

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #3566bb;
/* rgb */ color: rgb(53, 102, 187);
/* oklch */ color: oklch(52.1% 0.144 260.6);

Tailwind

colors: {
  custom: {
    50: '#7d91d0',
    500: '#3566bb',
    950: '#000000',
  },
}

SCSS

$custom: #3566bb;
$custom-light: #7d91d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3566bb",
  "rgb": {
    "r": 53,
    "g": 102,
    "b": 187
  },
  "hsl": {
    "h": 218.06,
    "s": 55.833,
    "l": 47.059
  },
  "oklch": {
    "l": 0.52135,
    "c": 0.14418,
    "h": 260.6
  },
  "luminance": 0.13847
}

Semantic roles & 50–950 ramp

primary

#3566BB

secondary

#C9AF83

accent

#A849DF

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C14

muted

#7C7D82

Preview Lab

Preview with #3566BB

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

Preview Lab → · Contrast checker → · Palette generator →