#373EA3#373EA3

#373EA3 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.2% C 0.161 H 274.2°. Best body text is #FFFFFF at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#373EA3
RGB	rgb(55, 62, 163)
HSL	hsl(236, 50%, 43%)
HSV	hsv(236, 66%, 64%)
CMYK	cmyk(66.3%, 62%, 0%, 36.1%)
CIE-LAB	lab(31.58, 30.22, -55.56)
CIE-LCH	lch(31.58, 63.24, 298.54°)
OKLab	oklab(42.23% 0.0118 -0.1601)
OKLCH	oklch(42.23% 0.161 274.2)
XYZ	xyz(9.9068, 6.9010, 35.4532)
Luminance	0.0690 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373EA3 #A39C37

analogous

#3774A3 #373EA3 #6637A3

triadic

#373EA3 #A3373E #3EA337

tetradic

#373EA3 #A33774 #A39C37 #37A366

square

#373EA3 #A33774 #A39C37 #37A366

split-complementary

#373EA3 #A36637 #74A337

monochromatic

#181B47 #282D75 #373EA3 #525AC5 #8086D4

Accessibility & contrast

On white

8.82

#373EA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#373EA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373EA3

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373EA3	#FFFFFF	#000000	##FFFFFF
##373EA3	1.00	8.82	2.38	8.82
#FFFFFF	8.82	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA6

Deuteranopia (green-blind)

#0046A1

Tritanopia (blue-blind)

#00576A

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #373ea3;
/* rgb */ color: rgb(55, 62, 163);
/* oklch */ color: oklch(42.2% 0.161 274.2);

Tailwind

colors: {
  custom: {
    50: '#7b73bf',
    500: '#373ea3',
    950: '#000000',
  },
}

SCSS

$custom: #373ea3;
$custom-light: #7b73bf;
$custom-dark: #000000;

JSON

{
  "hex": "#373ea3",
  "rgb": {
    "r": 55,
    "g": 62,
    "b": 163
  },
  "hsl": {
    "h": 236.111,
    "s": 49.541,
    "l": 42.745
  },
  "oklch": {
    "l": 0.4223,
    "c": 0.16052,
    "h": 274.2
  },
  "luminance": 0.06902
}

Semantic roles & 50–950 ramp

primary

#373EA3

secondary

#BEB978

accent

#D04FD9

background

#F8F7FB

surface

#EFEDF7

border

#CAC8D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #373EA3

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

Preview Lab → · Contrast checker → · Palette generator →