#373CB1#373CB1

#373CB1 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.1% C 0.182 H 273.9°. Best body text is #FFFFFF at 8.59:1 contrast (WCAG AA passes).

Color values

HEX	#373CB1
RGB	rgb(55, 60, 177)
HSL	hsl(238, 53%, 45%)
HSV	hsv(238, 69%, 69%)
CMYK	cmyk(68.9%, 66.1%, 0%, 30.6%)
CIE-LAB	lab(32.30, 36.40, -62.77)
CIE-LCH	lch(32.30, 72.56, 300.11°)
OKLab	oklab(43.13% 0.0124 -0.1813)
OKLCH	oklch(43.13% 0.182 273.9)
XYZ	xyz(11.1246, 7.2172, 42.3932)
Luminance	0.0722 (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

#373CB1 #B1AC37

analogous

#3779B1 #373CB1 #6F37B1

triadic

#373CB1 #B1373C #3CB137

tetradic

#373CB1 #B13779 #B1AC37 #37B16F

square

#373CB1 #B13779 #B1AC37 #37B16F

split-complementary

#373CB1 #B16F37 #79B137

monochromatic

#1A1C54 #282C82 #373CB1 #5A5ECC #888CDA

Accessibility & contrast

On white

8.59

#373CB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#373CB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373CB1

8.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373CB1	#FFFFFF	#000000	##FFFFFF
##373CB1	1.00	8.59	2.44	8.59
#FFFFFF	8.59	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B5

Deuteranopia (green-blind)

#0046AF

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #373cb1;
/* rgb */ color: rgb(55, 60, 177);
/* oklch */ color: oklch(43.1% 0.182 273.9);

Tailwind

colors: {
  custom: {
    50: '#7e72c9',
    500: '#373cb1',
    950: '#000000',
  },
}

SCSS

$custom: #373cb1;
$custom-light: #7e72c9;
$custom-dark: #000000;

JSON

{
  "hex": "#373cb1",
  "rgb": {
    "r": 55,
    "g": 60,
    "b": 177
  },
  "hsl": {
    "h": 237.541,
    "s": 52.586,
    "l": 45.49
  },
  "oklch": {
    "l": 0.43126,
    "c": 0.18169,
    "h": 273.9
  },
  "luminance": 0.07218
}

Semantic roles & 50–950 ramp

primary

#373CB1

secondary

#C4C180

accent

#D64CDC

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373CB1

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

Preview Lab → · Contrast checker → · Palette generator →