#373BB9#373BB9

#373BB9 is a dark, vivid blue. Relative luminance 0.074; OKLCH L 43.7% C 0.193 H 273.6°. Best body text is #FFFFFF at 8.44:1 contrast (WCAG AA passes).

Color values

HEX#373BB9
RGBrgb(55, 59, 185)
HSLhsl(238, 54%, 47%)
HSVhsv(238, 70%, 73%)
CMYKcmyk(70.3%, 68.1%, 0%, 27.5%)
CIE-LABlab(32.79, 39.78, -66.70)
CIE-LCHlch(32.79, 77.66, 300.81°)
OKLaboklab(43.71% 0.0123 -0.1928)
OKLCHoklch(43.71% 0.193 273.6)
XYZxyz(11.8935, 7.4418, 46.6991)
Luminance0.0744 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#373BB9 #B9B537
analogous
#377CB9 #373BB9 #7437B9
triadic
#373BB9 #B9373B #3BB937
tetradic
#373BB9 #B9377C #B9B537 #37B974
square
#373BB9 #B9377C #B9B537 #37B974
split-complementary
#373BB9 #B97437 #7CB937
monochromatic
#1B1D5B #292C8A #373BB9 #5E62CF #8D90DD

Accessibility & contrast

On white

8.44
#373BB9 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.49
#373BB9 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #373BB9
8.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##373BB9#FFFFFF#000000##FFFFFF
##373BB91.008.442.498.44
#FFFFFF8.441.0021.001.00
#0000002.4921.001.0021.00
##FFFFFF8.441.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0053BD
Deuteranopia (green-blind)
#0047B7
Tritanopia (blue-blind)
#005D75
Achromatopsia (no color)
#4D4D4D

Design tokens & code

CSS
--color: #373bb9;
/* rgb */ color: rgb(55, 59, 185);
/* oklch */ color: oklch(43.7% 0.193 273.6);
Tailwind
colors: {
  custom: {
    50: '#8071cf',
    500: '#373bb9',
    950: '#000000',
  },
}
SCSS
$custom: #373bb9;
$custom-light: #8071cf;
$custom-dark: #000000;
JSON
{
  "hex": "#373bb9",
  "rgb": {
    "r": 55,
    "g": 59,
    "b": 185
  },
  "hsl": {
    "h": 238.154,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.43708,
    "c": 0.19316,
    "h": 273.6
  },
  "luminance": 0.07443
}

Semantic roles & 50–950 ramp

primary
#373BB9
secondary
#C8C684
accent
#D94ADE
background
#F8F6FC
surface
#F0ECF9
border
#CBC7D2
text
#0C0814
muted
#7D7B82

Preview Lab

Preview with #373BB9

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

Preview Lab → · Contrast checker → · Palette generator →

#373BB9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva