#373FB5#373FB5

#373FB5 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 44.0% C 0.183 H 273.1°. Best body text is #FFFFFF at 8.27:1 contrast (WCAG AA passes).

Color values

HEX	#373FB5
RGB	rgb(55, 63, 181)
HSL	hsl(236, 53%, 46%)
HSV	hsv(236, 70%, 71%)
CMYK	cmyk(69.6%, 65.2%, 0%, 29%)
CIE-LAB	lab(33.35, 35.92, -63.41)
CIE-LCH	lch(33.35, 72.88, 299.53°)
OKLab	oklab(44.01% 0.01 -0.1831)
OKLCH	oklch(44.01% 0.183 273.1)
XYZ	xyz(11.6908, 7.7023, 44.5777)
Luminance	0.0770 (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

#373FB5 #B5AD37

analogous

#377EB5 #373FB5 #6E37B5

triadic

#373FB5 #B5373F #3FB537

tetradic

#373FB5 #B5377E #B5AD37 #37B56E

square

#373FB5 #B5377E #B5AD37 #37B56E

split-complementary

#373FB5 #B56E37 #7EB537

monochromatic

#1A1E57 #292F86 #373FB5 #5C63CD #8B90DC

Accessibility & contrast

On white

8.27

#373FB5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#373FB5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FB5

8.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373FB5	#FFFFFF	#000000	##FFFFFF
##373FB5	1.00	8.27	2.54	8.27
#FFFFFF	8.27	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B9

Deuteranopia (green-blind)

#0049B3

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373fb5;
/* rgb */ color: rgb(55, 63, 181);
/* oklch */ color: oklch(44.0% 0.183 273.1);

Tailwind

colors: {
  custom: {
    50: '#7f74cc',
    500: '#373fb5',
    950: '#000000',
  },
}

SCSS

$custom: #373fb5;
$custom-light: #7f74cc;
$custom-dark: #000000;

JSON

{
  "hex": "#373fb5",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 181
  },
  "hsl": {
    "h": 236.19,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.44007,
    "c": 0.18339,
    "h": 273.1
  },
  "luminance": 0.07703
}

Semantic roles & 50–950 ramp

primary

#373FB5

secondary

#C6C282

accent

#D44BDD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #373FB5

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

Preview Lab → · Contrast checker → · Palette generator →