#373DB0#373DB0

#373DB0 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.2% C 0.179 H 273.8°. Best body text is #FFFFFF at 8.55:1 contrast (WCAG AA passes).

Color values

HEX	#373DB0
RGB	rgb(55, 61, 176)
HSL	hsl(237, 52%, 45%)
HSV	hsv(237, 69%, 69%)
CMYK	cmyk(68.8%, 65.3%, 0%, 31%)
CIE-LAB	lab(32.44, 35.43, -61.94)
CIE-LCH	lch(32.44, 71.35, 299.77°)
OKLab	oklab(43.21% 0.0118 -0.1788)
OKLCH	oklch(43.21% 0.179 273.8)
XYZ	xyz(11.0782, 7.2833, 41.8879)
Luminance	0.0728 (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

#373DB0 #B0AA37

analogous

#3779B0 #373DB0 #6E37B0

triadic

#373DB0 #B0373D #3DB037

tetradic

#373DB0 #B03779 #B0AA37 #37B06E

square

#373DB0 #B03779 #B0AA37 #37B06E

split-complementary

#373DB0 #B06E37 #79B037

monochromatic

#1A1D53 #282D81 #373DB0 #595FCB #888CDA

Accessibility & contrast

On white

8.55

#373DB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#373DB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DB0

8.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DB0	#FFFFFF	#000000	##FFFFFF
##373DB0	1.00	8.55	2.46	8.55
#FFFFFF	8.55	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B4

Deuteranopia (green-blind)

#0047AE

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #373db0;
/* rgb */ color: rgb(55, 61, 176);
/* oklch */ color: oklch(43.2% 0.179 273.8);

Tailwind

colors: {
  custom: {
    50: '#7e73c9',
    500: '#373db0',
    950: '#000000',
  },
}

SCSS

$custom: #373db0;
$custom-light: #7e73c9;
$custom-dark: #000000;

JSON

{
  "hex": "#373db0",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 176
  },
  "hsl": {
    "h": 237.025,
    "s": 52.381,
    "l": 45.294
  },
  "oklch": {
    "l": 0.43206,
    "c": 0.1792,
    "h": 273.8
  },
  "luminance": 0.07284
}

Semantic roles & 50–950 ramp

primary

#373DB0

secondary

#C4C07F

accent

#D54CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373DB0

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

Preview Lab → · Contrast checker → · Palette generator →