#373DB8#373DB8

#373DB8 is a dark, vivid blue. Relative luminance 0.076; OKLCH L 43.9% C 0.190 H 273.3°. Best body text is #FFFFFF at 8.33:1 contrast (WCAG AA passes).

Color values

HEX	#373DB8
RGB	rgb(55, 61, 184)
HSL	hsl(237, 54%, 47%)
HSV	hsv(237, 70%, 72%)
CMYK	cmyk(70.1%, 66.8%, 0%, 27.8%)
CIE-LAB	lab(33.16, 38.21, -65.52)
CIE-LCH	lch(33.16, 75.84, 300.25°)
OKLab	oklab(43.94% 0.0111 -0.1893)
OKLCH	oklch(43.94% 0.19 273.3)
XYZ	xyz(11.8931, 7.6093, 46.1801)
Luminance	0.0761 (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

#373DB8 #B8B237

analogous

#377EB8 #373DB8 #7137B8

triadic

#373DB8 #B8373D #3DB837

tetradic

#373DB8 #B8377E #B8B237 #37B871

square

#373DB8 #B8377E #B8B237 #37B871

split-complementary

#373DB8 #B87137 #7EB837

monochromatic

#1B1E5A #292D89 #373DB8 #5D63CF #8D90DD

Accessibility & contrast

On white

8.33

#373DB8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.52

#373DB8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373DB8

8.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##373DB8	#FFFFFF	#000000	##FFFFFF
##373DB8	1.00	8.33	2.52	8.33
#FFFFFF	8.33	1.00	21.00	1.00
#000000	2.52	21.00	1.00	21.00
##FFFFFF	8.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054BC

Deuteranopia (green-blind)

#0048B6

Tritanopia (blue-blind)

#005E75

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #373db8;
/* rgb */ color: rgb(55, 61, 184);
/* oklch */ color: oklch(43.9% 0.190 273.3);

Tailwind

colors: {
  custom: {
    50: '#7f73ce',
    500: '#373db8',
    950: '#000000',
  },
}

SCSS

$custom: #373db8;
$custom-light: #7f73ce;
$custom-dark: #000000;

JSON

{
  "hex": "#373db8",
  "rgb": {
    "r": 55,
    "g": 61,
    "b": 184
  },
  "hsl": {
    "h": 237.209,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.43943,
    "c": 0.18961,
    "h": 273.3
  },
  "luminance": 0.0761
}

Semantic roles & 50–950 ramp

primary

#373DB8

secondary

#C7C484

accent

#D74ADD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #373DB8

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

Preview Lab → · Contrast checker → · Palette generator →