#373CB3#373CB3

#373CB3 is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.3% C 0.184 H 273.8°. Best body text is #FFFFFF at 8.54:1 contrast (WCAG AA passes).

Color values

HEX	#373CB3
RGB	rgb(55, 60, 179)
HSL	hsl(238, 53%, 46%)
HSV	hsv(238, 69%, 70%)
CMYK	cmyk(69.3%, 66.5%, 0%, 29.8%)
CIE-LAB	lab(32.48, 37.10, -63.67)
CIE-LCH	lch(32.48, 73.69, 300.23°)
OKLab	oklab(43.31% 0.0122 -0.1839)
OKLCH	oklch(43.31% 0.184 273.8)
XYZ	xyz(11.3254, 7.2976, 43.4508)
Luminance	0.0730 (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

#373CB3 #B3AE37

analogous

#377AB3 #373CB3 #7037B3

triadic

#373CB3 #B3373C #3CB337

tetradic

#373CB3 #B3377A #B3AE37 #37B370

square

#373CB3 #B3377A #B3AE37 #37B370

split-complementary

#373CB3 #B37037 #7AB337

monochromatic

#1A1D55 #292C84 #373CB3 #5B5FCD #8A8DDB

Accessibility & contrast

On white

8.54

#373CB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#373CB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373CB3

8.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373CB3	#FFFFFF	#000000	##FFFFFF
##373CB3	1.00	8.54	2.46	8.54
#FFFFFF	8.54	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.54	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B7

Deuteranopia (green-blind)

#0047B1

Tritanopia (blue-blind)

#005B72

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #373cb3;
/* rgb */ color: rgb(55, 60, 179);
/* oklch */ color: oklch(43.3% 0.184 273.8);

Tailwind

colors: {
  custom: {
    50: '#7e72cb',
    500: '#373cb3',
    950: '#000000',
  },
}

SCSS

$custom: #373cb3;
$custom-light: #7e72cb;
$custom-dark: #000000;

JSON

{
  "hex": "#373cb3",
  "rgb": {
    "r": 55,
    "g": 60,
    "b": 179
  },
  "hsl": {
    "h": 237.581,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.43311,
    "c": 0.1843,
    "h": 273.8
  },
  "luminance": 0.07299
}

Semantic roles & 50–950 ramp

primary

#373CB3

secondary

#C5C281

accent

#D74BDC

background

#F8F6FC

surface

#EFECF9

border

#CAC7D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373CB3

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

Preview Lab → · Contrast checker → · Palette generator →