#373DB4#373DB4

#373DB4 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.6% C 0.184 H 273.6°. Best body text is #FFFFFF at 8.44:1 contrast (WCAG AA passes).

Color values

HEX	#373DB4
RGB	rgb(55, 61, 180)
HSL	hsl(237, 53%, 46%)
HSV	hsv(237, 69%, 71%)
CMYK	cmyk(69.4%, 66.1%, 0%, 29.4%)
CIE-LAB	lab(32.80, 36.82, -63.73)
CIE-LCH	lch(32.80, 73.61, 300.02°)
OKLab	oklab(43.57% 0.0114 -0.1841)
OKLCH	oklch(43.57% 0.184 273.6)
XYZ	xyz(11.4798, 7.4439, 44.0030)
Luminance	0.0745 (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

#373DB4 #B4AE37

analogous

#377BB4 #373DB4 #6F37B4

triadic

#373DB4 #B4373D #3DB437

tetradic

#373DB4 #B4377B #B4AE37 #37B46F

square

#373DB4 #B4377B #B4AE37 #37B46F

split-complementary

#373DB4 #B46F37 #7BB437

monochromatic

#1A1D56 #292D85 #373DB4 #5B61CD #8A8EDB

Accessibility & contrast

On white

8.44

#373DB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#373DB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DB4

8.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DB4	#FFFFFF	#000000	##FFFFFF
##373DB4	1.00	8.44	2.49	8.44
#FFFFFF	8.44	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B8

Deuteranopia (green-blind)

#0047B2

Tritanopia (blue-blind)

#005C73

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #373db4;
/* rgb */ color: rgb(55, 61, 180);
/* oklch */ color: oklch(43.6% 0.184 273.6);

Tailwind

colors: {
  custom: {
    50: '#7f73cb',
    500: '#373db4',
    950: '#000000',
  },
}

SCSS

$custom: #373db4;
$custom-light: #7f73cb;
$custom-dark: #000000;

JSON

{
  "hex": "#373db4",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 180
  },
  "hsl": {
    "h": 237.12,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.43572,
    "c": 0.18444,
    "h": 273.6
  },
  "luminance": 0.07445
}

Semantic roles & 50–950 ramp

primary

#373DB4

secondary

#C6C281

accent

#D64BDD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373DB4

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

Preview Lab → · Contrast checker → · Palette generator →