#373EB4#373EB4

#373EB4 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.7% C 0.183 H 273.4°. Best body text is #FFFFFF at 8.36:1 contrast (WCAG AA passes).

Color values

HEX	#373EB4
RGB	rgb(55, 62, 180)
HSL	hsl(237, 53%, 46%)
HSV	hsv(237, 69%, 71%)
CMYK	cmyk(69.4%, 65.6%, 0%, 29.4%)
CIE-LAB	lab(33.03, 36.20, -63.35)
CIE-LCH	lch(33.03, 72.96, 299.74°)
OKLab	oklab(43.74% 0.0107 -0.1829)
OKLCH	oklch(43.74% 0.183 273.4)
XYZ	xyz(11.5336, 7.5517, 44.0210)
Luminance	0.0755 (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

#373EB4 #B4AD37

analogous

#377CB4 #373EB4 #6E37B4

triadic

#373EB4 #B4373E #3EB437

tetradic

#373EB4 #B4377C #B4AD37 #37B46E

square

#373EB4 #B4377C #B4AD37 #37B46E

split-complementary

#373EB4 #B46E37 #7CB437

monochromatic

#1A1E56 #292E85 #373EB4 #5B62CD #8A8FDB

Accessibility & contrast

On white

8.36

#373EB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#373EB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373EB4

8.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373EB4	#FFFFFF	#000000	##FFFFFF
##373EB4	1.00	8.36	2.51	8.36
#FFFFFF	8.36	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B8

Deuteranopia (green-blind)

#0048B2

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373eb4;
/* rgb */ color: rgb(55, 62, 180);
/* oklch */ color: oklch(43.7% 0.183 273.4);

Tailwind

colors: {
  custom: {
    50: '#7f73cb',
    500: '#373eb4',
    950: '#000000',
  },
}

SCSS

$custom: #373eb4;
$custom-light: #7f73cb;
$custom-dark: #000000;

JSON

{
  "hex": "#373eb4",
  "rgb": {
    "r": 55,
    "g": 62,
    "b": 180
  },
  "hsl": {
    "h": 236.64,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.43743,
    "c": 0.18326,
    "h": 273.4
  },
  "luminance": 0.07553
}

Semantic roles & 50–950 ramp

primary

#373EB4

secondary

#C6C281

accent

#D44BDD

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373EB4

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

Preview Lab → · Contrast checker → · Palette generator →