#3747D8#3747D8

#3747D8 is a mid, highly saturated blue. Relative luminance 0.103; OKLCH L 48.6% C 0.219 H 270.5°. Best body text is #FFFFFF at 6.87:1 contrast (WCAG AA passes).

Color values

HEX#3747D8
RGBrgb(55, 71, 216)
HSLhsl(234, 67%, 53%)
HSVhsv(234, 75%, 85%)
CMYKcmyk(74.5%, 67.1%, 0%, 15.3%)
CIE-LABlab(38.33, 43.15, -75.66)
CIE-LCHlch(38.33, 87.09, 299.70°)
OKLaboklab(48.59% 0.0021 -0.2189)
OKLCHoklch(48.59% 0.219 270.5)
XYZxyz(16.2192, 10.2748, 66.0809)
Luminance0.1028 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3747D8 #D8C837
analogous
#3798D8 #3747D8 #7737D8
triadic
#3747D8 #D83747 #47D837
tetradic
#3747D8 #D83798 #D8C837 #37D877
square
#3747D8 #D83798 #D8C837 #37D877
split-complementary
#3747D8 #D87737 #98D837
monochromatic
#18227C #2230B0 #3747D8 #6A76E2 #9DA5EC

Accessibility & contrast

On white

6.87
#3747D8 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.06
#3747D8 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3747D8
6.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3747D8#FFFFFF#000000##FFFFFF
##3747D81.006.873.066.87
#FFFFFF6.871.0021.001.00
#0000003.0621.001.0021.00
##FFFFFF6.871.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0062DC
Deuteranopia (green-blind)
#0053D5
Tritanopia (blue-blind)
#006E8A
Achromatopsia (no color)
#5A5A5A

Design tokens & code

CSS
--color: #3747d8;
/* rgb */ color: rgb(55, 71, 216);
/* oklch */ color: oklch(48.6% 0.219 270.5);
Tailwind
colors: {
  custom: {
    50: '#867ae5',
    500: '#3747d8',
    950: '#000000',
  },
}
SCSS
$custom: #3747d8;
$custom-light: #867ae5;
$custom-dark: #000000;
JSON
{
  "hex": "#3747d8",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 216
  },
  "hsl": {
    "h": 234.037,
    "s": 67.364,
    "l": 53.137
  },
  "oklch": {
    "l": 0.48588,
    "c": 0.21892,
    "h": 270.5
  },
  "luminance": 0.10277
}

Semantic roles & 50–950 ramp

primary
#3747D8
secondary
#D8D193
accent
#D93EEA
background
#F9F7FE
surface
#F1EDFC
border
#CBC8D5
text
#0D0916
muted
#7E7B84

Preview Lab

Preview with #3747D8

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

Preview Lab → · Contrast checker → · Palette generator →

#3747D8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva