#373DB1#373DB1

#373DB1 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.3% C 0.181 H 273.7°. Best body text is #FFFFFF at 8.52:1 contrast (WCAG AA passes).

Color values

HEX	#373DB1
RGB	rgb(55, 61, 177)
HSL	hsl(237, 53%, 45%)
HSV	hsv(237, 69%, 69%)
CMYK	cmyk(68.9%, 65.5%, 0%, 30.6%)
CIE-LAB	lab(32.53, 35.78, -62.39)
CIE-LCH	lch(32.53, 71.92, 299.83°)
OKLab	oklab(43.3% 0.0117 -0.1801)
OKLCH	oklch(43.3% 0.181 273.7)
XYZ	xyz(11.1775, 7.3230, 42.4109)
Luminance	0.0732 (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

#373DB1 #B1AB37

analogous

#377AB1 #373DB1 #6E37B1

triadic

#373DB1 #B1373D #3DB137

tetradic

#373DB1 #B1377A #B1AB37 #37B16E

square

#373DB1 #B1377A #B1AB37 #37B16E

split-complementary

#373DB1 #B16E37 #7AB137

monochromatic

#1A1D54 #282D82 #373DB1 #5A5FCC #888CDA

Accessibility & contrast

On white

8.52

#373DB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#373DB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DB1

8.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DB1	#FFFFFF	#000000	##FFFFFF
##373DB1	1.00	8.52	2.46	8.52
#FFFFFF	8.52	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B5

Deuteranopia (green-blind)

#0047AF

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #373db1;
/* rgb */ color: rgb(55, 61, 177);
/* oklch */ color: oklch(43.3% 0.181 273.7);

Tailwind

colors: {
  custom: {
    50: '#7e73c9',
    500: '#373db1',
    950: '#000000',
  },
}

SCSS

$custom: #373db1;
$custom-light: #7e73c9;
$custom-dark: #000000;

JSON

{
  "hex": "#373db1",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 177
  },
  "hsl": {
    "h": 237.049,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.43297,
    "c": 0.18051,
    "h": 273.7
  },
  "luminance": 0.07324
}

Semantic roles & 50–950 ramp

primary

#373DB1

secondary

#C4C180

accent

#D54CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373DB1

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

Preview Lab → · Contrast checker → · Palette generator →