#373B8A#373B8A

#373B8A is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.6% C 0.129 H 276.6°. Best body text is #FFFFFF at 9.74:1 contrast (WCAG AA passes).

Color values

HEX#373B8A
RGBrgb(55, 59, 138)
HSLhsl(237, 43%, 38%)
HSVhsv(237, 60%, 54%)
CMYKcmyk(60.1%, 57.2%, 0%, 45.9%)
CIE-LABlab(28.84, 23.33, -44.75)
CIE-LCHlch(28.84, 50.46, 297.53°)
OKLaboklab(39.58% 0.0148 -0.1283)
OKLCHoklch(39.58% 0.129 276.6)
XYZxyz(7.7255, 5.7746, 24.7473)
Luminance0.0578 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#373B8A #8A8637
analogous
#37658A #373B8A #5C378A
triadic
#373B8A #8A373B #3B8A37
tetradic
#373B8A #8A3765 #8A8637 #378A5C
square
#373B8A #8A3765 #8A8637 #378A5C
split-complementary
#373B8A #8A5C37 #658A37
monochromatic
#141632 #26285E #373B8A #484EB6 #7478C8

Accessibility & contrast

On white

9.74
#373B8A on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.16
#373B8A on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373B8A
9.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##373B8A#FFFFFF#000000##FFFFFF
##373B8A1.009.742.169.74
#FFFFFF9.741.0021.001.00
#0000002.1621.001.0021.00
##FFFFFF9.741.0021.001.00

Color blindness preview

Protanopia (red-blind)
#00488D
Deuteranopia (green-blind)
#004188
Tritanopia (blue-blind)
#004E5C
Achromatopsia (no color)
#444444

Design tokens & code

CSS
--color: #373b8a;
/* rgb */ color: rgb(55, 59, 138);
/* oklch */ color: oklch(39.6% 0.129 276.6);
Tailwind
colors: {
  custom: {
    50: '#7671ad',
    500: '#373b8a',
    950: '#000000',
  },
}
SCSS
$custom: #373b8a;
$custom-light: #7671ad;
$custom-dark: #000000;
JSON
{
  "hex": "#373b8a",
  "rgb": {
    "r": 55,
    "g": 59,
    "b": 138
  },
  "hsl": {
    "h": 237.108,
    "s": 43.005,
    "l": 37.843
  },
  "oklch": {
    "l": 0.39577,
    "c": 0.12919,
    "h": 276.6
  },
  "luminance": 0.05775
}

Semantic roles & 50–950 ramp

primary
#373B8A
secondary
#B0AD6D
accent
#CD55D3
background
#F7F6FA
surface
#EEECF4
border
#C9C7CE
text
#090710
muted
#7B7A7F

Preview Lab

Preview with #373B8A

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

Preview Lab → · Contrast checker → · Palette generator →

#373B8A Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva