#373FA9#373FA9

#373FA9 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.9% C 0.167 H 273.7°. Best body text is #FFFFFF at 8.58:1 contrast (WCAG AA passes).

Color values

HEX#373FA9
RGBrgb(55, 63, 169)
HSLhsl(236, 51%, 44%)
HSVhsv(236, 67%, 66%)
CMYKcmyk(67.5%, 62.7%, 0%, 33.7%)
CIE-LABlab(32.33, 31.70, -57.94)
CIE-LCHlch(32.33, 66.05, 298.68°)
OKLaboklab(42.94% 0.0107 -0.1671)
OKLCHoklch(42.94% 0.167 273.7)
XYZxyz(10.5121, 7.2309, 38.3701)
Luminance0.0723 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#373FA9 #A9A137
analogous
#3778A9 #373FA9 #6837A9
triadic
#373FA9 #A9373F #3FA937
tetradic
#373FA9 #A93778 #A9A137 #37A968
square
#373FA9 #A93778 #A9A137 #37A968
split-complementary
#373FA9 #A96837 #78A937
monochromatic
#191D4D #282E7B #373FA9 #555DC8 #8489D7

Accessibility & contrast

On white

8.58
#373FA9 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.45
#373FA9 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373FA9
8.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##373FA9#FFFFFF#000000##FFFFFF
##373FA91.008.582.458.58
#FFFFFF8.581.0021.001.00
#0000002.4521.001.0021.00
##FFFFFF8.581.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0051AC
Deuteranopia (green-blind)
#0047A7
Tritanopia (blue-blind)
#005A6E
Achromatopsia (no color)
#4C4C4C

Design tokens & code

CSS
--color: #373fa9;
/* rgb */ color: rgb(55, 63, 169);
/* oklch */ color: oklch(42.9% 0.167 273.7);
Tailwind
colors: {
  custom: {
    50: '#7c74c3',
    500: '#373fa9',
    950: '#000000',
  },
}
SCSS
$custom: #373fa9;
$custom-light: #7c74c3;
$custom-dark: #000000;
JSON
{
  "hex": "#373fa9",
  "rgb": {
    "r": 55,
    "g": 63,
    "b": 169
  },
  "hsl": {
    "h": 235.789,
    "s": 50.893,
    "l": 43.922
  },
  "oklch": {
    "l": 0.42935,
    "c": 0.16743,
    "h": 273.7
  },
  "luminance": 0.07232
}

Semantic roles & 50–950 ramp

primary
#373FA9
secondary
#C0BC7B
accent
#D04DDA
background
#F8F7FC
surface
#EFEDF8
border
#CAC8D1
text
#0B0813
muted
#7C7B82

Preview Lab

Preview with #373FA9

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

Preview Lab → · Contrast checker → · Palette generator →

#373FA9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva