#3748BF#3748BF

#3748BF is a mid, vivid blue. Relative luminance 0.092; OKLCH L 46.5% C 0.186 H 270.9°. Best body text is #FFFFFF at 7.39:1 contrast (WCAG AA passes).

Color values

HEX#3748BF
RGBrgb(55, 72, 191)
HSLhsl(233, 55%, 48%)
HSVhsv(233, 71%, 75%)
CMYKcmyk(71.2%, 62.3%, 0%, 25.1%)
CIE-LABlab(36.38, 33.76, -64.36)
CIE-LCHlch(36.38, 72.68, 297.68°)
OKLaboklab(46.49% 0.003 -0.1858)
OKLCHoklch(46.49% 0.186 270.9)
XYZxyz(13.2937, 9.2072, 50.3567)
Luminance0.0921 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3748BF #BFAE37
analogous
#378CBF #3748BF #6A37BF
triadic
#3748BF #BF3748 #48BF37
tetradic
#3748BF #BF378C #BFAE37 #37BF6A
square
#3748BF #BF378C #BFAE37 #37BF6A
split-complementary
#3748BF #BF6A37 #8CBF37
monochromatic
#1C2460 #29368F #3748BF #6270D2 #919BDF

Accessibility & contrast

On white

7.39
#3748BF on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.84
#3748BF on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748BF
7.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3748BF#FFFFFF#000000##FFFFFF
##3748BF1.007.392.847.39
#FFFFFF7.391.0021.001.00
#0000002.8421.001.0021.00
##FFFFFF7.391.0021.001.00

Color blindness preview

Protanopia (red-blind)
#005CC3
Deuteranopia (green-blind)
#004FBD
Tritanopia (blue-blind)
#00667D
Achromatopsia (no color)
#565656

Design tokens & code

CSS
--color: #3748bf;
/* rgb */ color: rgb(55, 72, 191);
/* oklch */ color: oklch(46.5% 0.186 270.9);
Tailwind
colors: {
  custom: {
    50: '#807bd3',
    500: '#3748bf',
    950: '#000000',
  },
}
SCSS
$custom: #3748bf;
$custom-light: #807bd3;
$custom-dark: #000000;
JSON
{
  "hex": "#3748bf",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 191
  },
  "hsl": {
    "h": 232.5,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.46491,
    "c": 0.18584,
    "h": 270.9
  },
  "luminance": 0.09209
}

Semantic roles & 50–950 ramp

primary
#3748BF
secondary
#CAC288
accent
#CC49DF
background
#F8F7FD
surface
#F0EDFA
border
#CBC8D3
text
#0C0914
muted
#7D7B83

Preview Lab

Preview with #3748BF

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

Preview Lab → · Contrast checker → · Palette generator →

#3748BF Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva