#373EB8#373EB8

#373EB8 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.1% C 0.188 H 273.2°. Best body text is #FFFFFF at 8.26:1 contrast (WCAG AA passes).

Color values

HEX	#373EB8
RGB	rgb(55, 62, 184)
HSL	hsl(237, 54%, 47%)
HSV	hsv(237, 70%, 72%)
CMYK	cmyk(70.1%, 66.3%, 0%, 27.8%)
CIE-LAB	lab(33.39, 37.59, -65.14)
CIE-LCH	lch(33.39, 75.21, 299.99°)
OKLab	oklab(44.11% 0.0104 -0.1882)
OKLCH	oklch(44.11% 0.188 273.2)
XYZ	xyz(11.9470, 7.7170, 46.1980)
Luminance	0.0772 (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

#373EB8 #B8B137

analogous

#377FB8 #373EB8 #7137B8

triadic

#373EB8 #B8373E #3EB837

tetradic

#373EB8 #B8377F #B8B137 #37B871

square

#373EB8 #B8377F #B8B137 #37B871

split-complementary

#373EB8 #B87137 #7FB837

monochromatic

#1B1E5A #292E89 #373EB8 #5D64CF #8D91DD

Accessibility & contrast

On white

8.26

#373EB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#373EB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373EB8

8.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373EB8	#FFFFFF	#000000	##FFFFFF
##373EB8	1.00	8.26	2.54	8.26
#FFFFFF	8.26	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055BC

Deuteranopia (green-blind)

#0049B6

Tritanopia (blue-blind)

#005E75

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373eb8;
/* rgb */ color: rgb(55, 62, 184);
/* oklch */ color: oklch(44.1% 0.188 273.2);

Tailwind

colors: {
  custom: {
    50: '#7f73ce',
    500: '#373eb8',
    950: '#000000',
  },
}

SCSS

$custom: #373eb8;
$custom-light: #7f73ce;
$custom-dark: #000000;

JSON

{
  "hex": "#373eb8",
  "rgb": {
    "r": 55,
    "g": 62,
    "b": 184
  },
  "hsl": {
    "h": 236.744,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.44111,
    "c": 0.18847,
    "h": 273.2
  },
  "luminance": 0.07718
}

Semantic roles & 50–950 ramp

primary

#373EB8

secondary

#C7C484

accent

#D54ADD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #373EB8

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

Preview Lab → · Contrast checker → · Palette generator →