#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
RGBrgb(55, 61, 184)
HSLhsl(237, 54%, 47%)
HSVhsv(237, 70%, 72%)
CMYKcmyk(70.1%, 66.8%, 0%, 27.8%)
CIE-LABlab(33.16, 38.21, -65.52)
CIE-LCHlch(33.16, 75.84, 300.25°)
OKLaboklab(43.94% 0.0111 -0.1893)
OKLCHoklch(43.94% 0.19 273.3)
XYZxyz(11.8931, 7.6093, 46.1801)
Luminance0.0761 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

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
##373DB81.008.332.528.33
#FFFFFF8.331.0021.001.00
#0000002.5221.001.0021.00
##FFFFFF8.331.0021.001.00

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 →

#373DB8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva