#3640B8#3640B8

#3640B8 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.4% C 0.186 H 272.4°. Best body text is #FFFFFF at 8.13:1 contrast (WCAG AA passes).

Color values

HEX	#3640B8
RGB	rgb(54, 64, 184)
HSL	hsl(235, 55%, 47%)
HSV	hsv(235, 71%, 72%)
CMYK	cmyk(70.7%, 65.2%, 0%, 27.8%)
CIE-LAB	lab(33.80, 36.22, -64.47)
CIE-LCH	lch(33.80, 73.95, 299.33°)
OKLab	oklab(44.39% 0.0079 -0.1862)
OKLCH	oklch(44.39% 0.186 272.4)
XYZ	xyz(12.0035, 7.9106, 46.2324)
Luminance	0.0791 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3640B8 #B8AE36

analogous

#3681B8 #3640B8 #6D36B8

triadic

#3640B8 #B83640 #40B836

tetradic

#3640B8 #B83681 #B8AE36 #36B86D

square

#3640B8 #B83681 #B8AE36 #36B86D

split-complementary

#3640B8 #B86D36 #81B836

monochromatic

#1A1F59 #283089 #3640B8 #5C65CF #8B92DD

Accessibility & contrast

On white

8.13

#3640B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.58

#3640B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3640B8

8.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3640B8	#FFFFFF	#000000	##FFFFFF
##3640B8	1.00	8.13	2.58	8.13
#FFFFFF	8.13	1.00	21.00	1.00
#000000	2.58	21.00	1.00	21.00
##FFFFFF	8.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BC

Deuteranopia (green-blind)

#0049B6

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3640b8;
/* rgb */ color: rgb(54, 64, 184);
/* oklch */ color: oklch(44.4% 0.186 272.4);

Tailwind

colors: {
  custom: {
    50: '#7f75ce',
    500: '#3640b8',
    950: '#000000',
  },
}

SCSS

$custom: #3640b8;
$custom-light: #7f75ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3640b8",
  "rgb": {
    "r": 54,
    "g": 64,
    "b": 184
  },
  "hsl": {
    "h": 235.385,
    "s": 54.622,
    "l": 46.667
  },
  "oklch": {
    "l": 0.44394,
    "c": 0.1864,
    "h": 272.4
  },
  "luminance": 0.07912
}

Semantic roles & 50–950 ramp

primary

#3640B8

secondary

#C7C282

accent

#D34ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #3640B8

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

Preview Lab → · Contrast checker → · Palette generator →