#373DB5#373DB5

#373DB5 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.7% C 0.186 H 273.5°. Best body text is #FFFFFF at 8.41:1 contrast (WCAG AA passes).

Color values

HEX	#373DB5
RGB	rgb(55, 61, 181)
HSL	hsl(237, 53%, 46%)
HSV	hsv(237, 70%, 71%)
CMYK	cmyk(69.6%, 66.3%, 0%, 29%)
CIE-LAB	lab(32.89, 37.17, -64.18)
CIE-LCH	lch(32.89, 74.17, 300.08°)
OKLab	oklab(43.67% 0.0114 -0.1854)
OKLCH	oklch(43.67% 0.186 273.5)
XYZ	xyz(11.5820, 7.4848, 44.5414)
Luminance	0.0749 (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

#373DB5 #B5AF37

analogous

#377CB5 #373DB5 #7037B5

triadic

#373DB5 #B5373D #3DB537

tetradic

#373DB5 #B5377C #B5AF37 #37B570

square

#373DB5 #B5377C #B5AF37 #37B570

split-complementary

#373DB5 #B57037 #7CB537

monochromatic

#1A1D57 #292D86 #373DB5 #5C61CD #8B8FDC

Accessibility & contrast

On white

8.41

#373DB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#373DB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DB5

8.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DB5	#FFFFFF	#000000	##FFFFFF
##373DB5	1.00	8.41	2.50	8.41
#FFFFFF	8.41	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B9

Deuteranopia (green-blind)

#0048B3

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #373db5;
/* rgb */ color: rgb(55, 61, 181);
/* oklch */ color: oklch(43.7% 0.186 273.5);

Tailwind

colors: {
  custom: {
    50: '#7f73cc',
    500: '#373db5',
    950: '#000000',
  },
}

SCSS

$custom: #373db5;
$custom-light: #7f73cc;
$custom-dark: #000000;

JSON

{
  "hex": "#373db5",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 181
  },
  "hsl": {
    "h": 237.143,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.43665,
    "c": 0.18573,
    "h": 273.5
  },
  "luminance": 0.07486
}

Semantic roles & 50–950 ramp

primary

#373DB5

secondary

#C6C382

accent

#D64BDD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373DB5

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

Preview Lab → · Contrast checker → · Palette generator →