#373DA3#373DA3

#373DA3 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.0% C 0.162 H 274.5°. Best body text is #FFFFFF at 8.90:1 contrast (WCAG AA passes).

Color values

HEX	#373DA3
RGB	rgb(55, 61, 163)
HSL	hsl(237, 50%, 43%)
HSV	hsv(237, 66%, 64%)
CMYK	cmyk(66.3%, 62.6%, 0%, 36.1%)
CIE-LAB	lab(31.33, 30.87, -55.96)
CIE-LCH	lch(31.33, 63.91, 298.88°)
OKLab	oklab(42.05% 0.0126 -0.1613)
OKLCH	oklch(42.05% 0.162 274.5)
XYZ	xyz(9.8530, 6.7932, 35.4352)
Luminance	0.0679 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#373DA3 #A39D37

analogous

#3773A3 #373DA3 #6737A3

triadic

#373DA3 #A3373D #3DA337

tetradic

#373DA3 #A33773 #A39D37 #37A367

square

#373DA3 #A33773 #A39D37 #37A367

split-complementary

#373DA3 #A36737 #73A337

monochromatic

#181B47 #282C75 #373DA3 #5259C5 #8085D4

Accessibility & contrast

On white

8.90

#373DA3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#373DA3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DA3

8.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DA3	#FFFFFF	#000000	##FFFFFF
##373DA3	1.00	8.90	2.36	8.90
#FFFFFF	8.90	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA6

Deuteranopia (green-blind)

#0045A1

Tritanopia (blue-blind)

#00576A

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #373da3;
/* rgb */ color: rgb(55, 61, 163);
/* oklch */ color: oklch(42.0% 0.162 274.5);

Tailwind

colors: {
  custom: {
    50: '#7b72bf',
    500: '#373da3',
    950: '#000000',
  },
}

SCSS

$custom: #373da3;
$custom-light: #7b72bf;
$custom-dark: #000000;

JSON

{
  "hex": "#373da3",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 163
  },
  "hsl": {
    "h": 236.667,
    "s": 49.541,
    "l": 42.745
  },
  "oklch": {
    "l": 0.42047,
    "c": 0.16178,
    "h": 274.5
  },
  "luminance": 0.06794
}

Semantic roles & 50–950 ramp

primary

#373DA3

secondary

#BEBA78

accent

#D14FD9

background

#F8F6FB

surface

#EFECF7

border

#CAC7D0

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #373DA3

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

Preview Lab → · Contrast checker → · Palette generator →