#373EB2#373EB2

#373EB2 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.6% C 0.181 H 273.5°. Best body text is #FFFFFF at 8.42:1 contrast (WCAG AA passes).

Color values

HEX	#373EB2
RGB	rgb(55, 62, 178)
HSL	hsl(237, 53%, 46%)
HSV	hsv(237, 69%, 70%)
CMYK	cmyk(69.1%, 65.2%, 0%, 30.2%)
CIE-LAB	lab(32.86, 35.50, -62.45)
CIE-LCH	lch(32.86, 71.84, 299.62°)
OKLab	oklab(43.56% 0.0109 -0.1803)
OKLCH	oklch(43.56% 0.181 273.5)
XYZ	xyz(11.3314, 7.4708, 42.9557)
Luminance	0.0747 (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

#373EB2 #B2AB37

analogous

#377CB2 #373EB2 #6D37B2

triadic

#373EB2 #B2373E #3EB237

tetradic

#373EB2 #B2377C #B2AB37 #37B26D

square

#373EB2 #B2377C #B2AB37 #37B26D

split-complementary

#373EB2 #B26D37 #7CB237

monochromatic

#1A1D54 #292E83 #373EB2 #5A61CC #898EDB

Accessibility & contrast

On white

8.42

#373EB2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.49

#373EB2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373EB2

8.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373EB2	#FFFFFF	#000000	##FFFFFF
##373EB2	1.00	8.42	2.49	8.42
#FFFFFF	8.42	1.00	21.00	1.00
#000000	2.49	21.00	1.00	21.00
##FFFFFF	8.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B6

Deuteranopia (green-blind)

#0048B0

Tritanopia (blue-blind)

#005C72

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #373eb2;
/* rgb */ color: rgb(55, 62, 178);
/* oklch */ color: oklch(43.6% 0.181 273.5);

Tailwind

colors: {
  custom: {
    50: '#7e73ca',
    500: '#373eb2',
    950: '#000000',
  },
}

SCSS

$custom: #373eb2;
$custom-light: #7e73ca;
$custom-dark: #000000;

JSON

{
  "hex": "#373eb2",
  "rgb": {
    "r": 55,
    "g": 62,
    "b": 178
  },
  "hsl": {
    "h": 236.585,
    "s": 52.79,
    "l": 45.686
  },
  "oklch": {
    "l": 0.43561,
    "c": 0.18064,
    "h": 273.5
  },
  "luminance": 0.07472
}

Semantic roles & 50–950 ramp

primary

#373EB2

secondary

#C5C180

accent

#D44CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373EB2

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

Preview Lab → · Contrast checker → · Palette generator →