#3747BF#3747BF

#3747BF is a mid, vivid blue. Relative luminance 0.091; OKLCH L 46.3% C 0.187 H 271.1°. Best body text is #FFFFFF at 7.46:1 contrast (WCAG AA passes).

Color values

HEX#3747BF
RGBrgb(55, 71, 191)
HSLhsl(233, 55%, 48%)
HSVhsv(233, 71%, 75%)
CMYKcmyk(71.2%, 62.8%, 0%, 25.1%)
CIE-LABlab(36.14, 34.40, -64.75)
CIE-LCHlch(36.14, 73.32, 297.98°)
OKLaboklab(46.31% 0.0037 -0.187)
OKLCHoklch(46.31% 0.187 271.1)
XYZxyz(13.2296, 9.0790, 50.3353)
Luminance0.0908 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3747BF #BFAF37
analogous
#378BBF #3747BF #6B37BF
triadic
#3747BF #BF3747 #47BF37
tetradic
#3747BF #BF378B #BFAF37 #37BF6B
square
#3747BF #BF378B #BFAF37 #37BF6B
split-complementary
#3747BF #BF6B37 #8BBF37
monochromatic
#1C2460 #29358F #3747BF #626FD2 #919ADF

Accessibility & contrast

On white

7.46
#3747BF on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.82
#3747BF on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3747BF
7.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3747BF#FFFFFF#000000##FFFFFF
##3747BF1.007.462.827.46
#FFFFFF7.461.0021.001.00
#0000002.8221.001.0021.00
##FFFFFF7.461.0021.001.00

Color blindness preview

Protanopia (red-blind)
#005BC3
Deuteranopia (green-blind)
#004FBD
Tritanopia (blue-blind)
#00667C
Achromatopsia (no color)
#555555

Design tokens & code

CSS
--color: #3747bf;
/* rgb */ color: rgb(55, 71, 191);
/* oklch */ color: oklch(46.3% 0.187 271.1);
Tailwind
colors: {
  custom: {
    50: '#807ad3',
    500: '#3747bf',
    950: '#000000',
  },
}
SCSS
$custom: #3747bf;
$custom-light: #807ad3;
$custom-dark: #000000;
JSON
{
  "hex": "#3747bf",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 191
  },
  "hsl": {
    "h": 232.941,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.46311,
    "c": 0.18704,
    "h": 271.1
  },
  "luminance": 0.0908
}

Semantic roles & 50–950 ramp

primary
#3747BF
secondary
#CAC288
accent
#CD49DF
background
#F8F7FD
surface
#F0EDFA
border
#CBC8D3
text
#0C0914
muted
#7D7B83

Preview Lab

Preview with #3747BF

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

Preview Lab → · Contrast checker → · Palette generator →

#3747BF Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva