#3640B7#3640B7

#3640B7 is a dark, vivid blue. Relative luminance 0.079; OKLCH L 44.3% C 0.185 H 272.5°. Best body text is #FFFFFF at 8.16:1 contrast (WCAG AA passes).

Color values

HEX	#3640B7
RGB	rgb(54, 64, 183)
HSL	hsl(235, 54%, 46%)
HSV	hsv(235, 70%, 72%)
CMYK	cmyk(70.5%, 65%, 0%, 28.2%)
CIE-LAB	lab(33.71, 35.87, -64.02)
CIE-LCH	lch(33.71, 73.38, 299.26°)
OKLab	oklab(44.3% 0.008 -0.1849)
OKLCH	oklch(44.3% 0.185 272.5)
XYZ	xyz(11.8991, 7.8688, 45.6823)
Luminance	0.0787 (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

#3640B7 #B7AD36

analogous

#3681B7 #3640B7 #6D36B7

triadic

#3640B7 #B73640 #40B736

tetradic

#3640B7 #B73681 #B7AD36 #36B76D

square

#3640B7 #B73681 #B7AD36 #36B76D

split-complementary

#3640B7 #B76D36 #81B736

monochromatic

#1A1F58 #282F88 #3640B7 #5B64CF #8B91DD

Accessibility & contrast

On white

8.16

#3640B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.57

#3640B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3640B7

8.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3640B7	#FFFFFF	#000000	##FFFFFF
##3640B7	1.00	8.16	2.57	8.16
#FFFFFF	8.16	1.00	21.00	1.00
#000000	2.57	21.00	1.00	21.00
##FFFFFF	8.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BB

Deuteranopia (green-blind)

#0049B5

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3640b7;
/* rgb */ color: rgb(54, 64, 183);
/* oklch */ color: oklch(44.3% 0.185 272.5);

Tailwind

colors: {
  custom: {
    50: '#7f75ce',
    500: '#3640b7',
    950: '#000000',
  },
}

SCSS

$custom: #3640b7;
$custom-light: #7f75ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3640b7",
  "rgb": {
    "r": 54,
    "g": 64,
    "b": 183
  },
  "hsl": {
    "h": 235.349,
    "s": 54.43,
    "l": 46.471
  },
  "oklch": {
    "l": 0.44303,
    "c": 0.18509,
    "h": 272.5
  },
  "luminance": 0.0787
}

Semantic roles & 50–950 ramp

primary

#3640B7

secondary

#C7C282

accent

#D24ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0814

muted

#7C7B82

Preview Lab

Preview with #3640B7

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

Preview Lab → · Contrast checker → · Palette generator →