#3640B9#3640B9

#3640B9 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.5% C 0.188 H 272.4°. Best body text is #FFFFFF at 8.11:1 contrast (WCAG AA passes).

Color values

HEX	#3640B9
RGB	rgb(54, 64, 185)
HSL	hsl(235, 55%, 47%)
HSV	hsv(235, 71%, 73%)
CMYK	cmyk(70.8%, 65.4%, 0%, 27.5%)
CIE-LAB	lab(33.88, 36.57, -64.91)
CIE-LCH	lch(33.88, 74.51, 299.40°)
OKLab	oklab(44.49% 0.0078 -0.1875)
OKLCH	oklch(44.49% 0.188 272.4)
XYZ	xyz(12.1087, 7.9527, 46.7864)
Luminance	0.0795 (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

#3640B9 #B9AF36

analogous

#3682B9 #3640B9 #6E36B9

triadic

#3640B9 #B93640 #40B936

tetradic

#3640B9 #B93682 #B9AF36 #36B96E

square

#3640B9 #B93682 #B9AF36 #36B96E

split-complementary

#3640B9 #B96E36 #82B936

monochromatic

#1A1F5A #28308A #3640B9 #5D65D0 #8C92DD

Accessibility & contrast

On white

8.11

#3640B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#3640B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3640B9

8.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3640B9	#FFFFFF	#000000	##FFFFFF
##3640B9	1.00	8.11	2.59	8.11
#FFFFFF	8.11	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BD

Deuteranopia (green-blind)

#004AB7

Tritanopia (blue-blind)

#006077

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3640b9;
/* rgb */ color: rgb(54, 64, 185);
/* oklch */ color: oklch(44.5% 0.188 272.4);

Tailwind

colors: {
  custom: {
    50: '#7f75cf',
    500: '#3640b9',
    950: '#000000',
  },
}

SCSS

$custom: #3640b9;
$custom-light: #7f75cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3640b9",
  "rgb": {
    "r": 54,
    "g": 64,
    "b": 185
  },
  "hsl": {
    "h": 235.42,
    "s": 54.812,
    "l": 46.863
  },
  "oklch": {
    "l": 0.44485,
    "c": 0.1877,
    "h": 272.4
  },
  "luminance": 0.07954
}

Semantic roles & 50–950 ramp

primary

#3640B9

secondary

#C8C383

accent

#D34ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #3640B9

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

Preview Lab → · Contrast checker → · Palette generator →