#373EB5#373EB5

#373EB5 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.8% C 0.185 H 273.3°. Best body text is #FFFFFF at 8.34:1 contrast (WCAG AA passes).

Color values

HEX	#373EB5
RGB	rgb(55, 62, 181)
HSL	hsl(237, 53%, 46%)
HSV	hsv(237, 70%, 71%)
CMYK	cmyk(69.6%, 65.7%, 0%, 29%)
CIE-LAB	lab(33.12, 36.55, -63.80)
CIE-LCH	lch(33.12, 73.53, 299.81°)
OKLab	oklab(43.84% 0.0107 -0.1843)
OKLCH	oklch(43.84% 0.185 273.3)
XYZ	xyz(11.6359, 7.5926, 44.5594)
Luminance	0.0759 (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

#373EB5 #B5AE37

analogous

#377DB5 #373EB5 #6F37B5

triadic

#373EB5 #B5373E #3EB537

tetradic

#373EB5 #B5377D #B5AE37 #37B56F

square

#373EB5 #B5377D #B5AE37 #37B56F

split-complementary

#373EB5 #B56F37 #7DB537

monochromatic

#1A1E57 #292E86 #373EB5 #5C62CD #8B8FDC

Accessibility & contrast

On white

8.34

#373EB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#373EB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373EB5

8.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373EB5	#FFFFFF	#000000	##FFFFFF
##373EB5	1.00	8.34	2.52	8.34
#FFFFFF	8.34	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B9

Deuteranopia (green-blind)

#0048B3

Tritanopia (blue-blind)

#005D74

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373eb5;
/* rgb */ color: rgb(55, 62, 181);
/* oklch */ color: oklch(43.8% 0.185 273.3);

Tailwind

colors: {
  custom: {
    50: '#7f73cc',
    500: '#373eb5',
    950: '#000000',
  },
}

SCSS

$custom: #373eb5;
$custom-light: #7f73cc;
$custom-dark: #000000;

JSON

{
  "hex": "#373eb5",
  "rgb": {
    "r": 55,
    "g": 62,
    "b": 181
  },
  "hsl": {
    "h": 236.667,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.43835,
    "c": 0.18457,
    "h": 273.3
  },
  "luminance": 0.07594
}

Semantic roles & 50–950 ramp

primary

#373EB5

secondary

#C6C282

accent

#D54BDD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373EB5

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

Preview Lab → · Contrast checker → · Palette generator →