#3640B5#3640B5

#3640B5 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.1% C 0.182 H 272.6°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#3640B5
RGB	rgb(54, 64, 181)
HSL	hsl(235, 54%, 46%)
HSV	hsv(235, 70%, 71%)
CMYK	cmyk(70.2%, 64.6%, 0%, 29%)
CIE-LAB	lab(33.53, 35.16, -63.12)
CIE-LCH	lch(33.53, 72.26, 299.12°)
OKLab	oklab(44.12% 0.0081 -0.1823)
OKLCH	oklch(44.12% 0.182 272.6)
XYZ	xyz(11.6924, 7.7861, 44.5938)
Luminance	0.0779 (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

#3640B5 #B5AB36

analogous

#367FB5 #3640B5 #6B36B5

triadic

#3640B5 #B53640 #40B536

tetradic

#3640B5 #B5367F #B5AB36 #36B56B

square

#3640B5 #B5367F #B5AB36 #36B56B

split-complementary

#3640B5 #B56B36 #7FB536

monochromatic

#1A1F57 #282F86 #3640B5 #5A63CE #8990DC

Accessibility & contrast

On white

8.21

#3640B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#3640B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3640B5

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3640B5	#FFFFFF	#000000	##FFFFFF
##3640B5	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B9

Deuteranopia (green-blind)

#0049B3

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3640b5;
/* rgb */ color: rgb(54, 64, 181);
/* oklch */ color: oklch(44.1% 0.182 272.6);

Tailwind

colors: {
  custom: {
    50: '#7e75cc',
    500: '#3640b5',
    950: '#000000',
  },
}

SCSS

$custom: #3640b5;
$custom-light: #7e75cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3640b5",
  "rgb": {
    "r": 54,
    "g": 64,
    "b": 181
  },
  "hsl": {
    "h": 235.276,
    "s": 54.043,
    "l": 46.078
  },
  "oklch": {
    "l": 0.44121,
    "c": 0.18247,
    "h": 272.6
  },
  "luminance": 0.07787
}

Semantic roles & 50–950 ramp

primary

#3640B5

secondary

#C6C181

accent

#D24ADD

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3640B5

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

Preview Lab → · Contrast checker → · Palette generator →