#3566B5#3566B5

#3566B5 is a mid, vivid blue. Relative luminance 0.136; OKLCH L 51.7% C 0.136 H 259.5°. Best body text is #FFFFFF at 5.65:1 contrast (WCAG AA passes).

Color values

HEX	#3566B5
RGB	rgb(53, 102, 181)
HSL	hsl(217, 55%, 46%)
HSV	hsv(217, 71%, 71%)
CMYK	cmyk(70.7%, 43.6%, 0%, 29%)
CIE-LAB	lab(43.65, 10.42, -46.76)
CIE-LCH	lch(43.65, 47.91, 282.57°)
OKLab	oklab(51.74% -0.0247 -0.1337)
OKLCH	oklch(51.74% 0.136 259.5)
XYZ	xyz(14.5571, 13.5943, 45.5639)
Luminance	0.1360 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3566B5 #B58435

analogous

#35A6B5 #3566B5 #4435B5

triadic

#3566B5 #B53566 #66B535

tetradic

#3566B5 #B535A6 #B58435 #35B544

square

#3566B5 #B535A6 #B58435 #35B544

split-complementary

#3566B5 #B54435 #A6B535

monochromatic

#193156 #274B86 #3566B5 #5986CE #88A8DC

Accessibility & contrast

On white

5.65

#3566B5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.72

#3566B5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3566B5

5.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3566B5	#FFFFFF	#000000	##FFFFFF
##3566B5	1.00	5.65	3.72	5.65
#FFFFFF	5.65	1.00	21.00	1.00
#000000	3.72	21.00	1.00	21.00
##FFFFFF	5.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#406DB8

Deuteranopia (green-blind)

#2962B3

Tritanopia (blue-blind)

#007884

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #3566b5;
/* rgb */ color: rgb(53, 102, 181);
/* oklch */ color: oklch(51.7% 0.136 259.5);

Tailwind

colors: {
  custom: {
    50: '#7c91cc',
    500: '#3566b5',
    950: '#000000',
  },
}

SCSS

$custom: #3566b5;
$custom-light: #7c91cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3566b5",
  "rgb": {
    "r": 53,
    "g": 102,
    "b": 181
  },
  "hsl": {
    "h": 217.031,
    "s": 54.701,
    "l": 45.882
  },
  "oklch": {
    "l": 0.51735,
    "c": 0.13594,
    "h": 259.5
  },
  "luminance": 0.13596
}

Semantic roles & 50–950 ramp

primary

#3566B5

secondary

#C6AB80

accent

#A54ADE

background

#F8F8FC

surface

#EFF0F9

border

#CACBD2

text

#0B0C13

muted

#7C7D82

Preview Lab

Preview with #3566B5

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

Preview Lab → · Contrast checker → · Palette generator →