#3748D8#3748D8

#3748D8 is a mid, highly saturated blue. Relative luminance 0.104; OKLCH L 48.8% C 0.218 H 270.4°. Best body text is #FFFFFF at 6.82:1 contrast (WCAG AA passes).

Color values

HEX#3748D8
RGBrgb(55, 72, 216)
HSLhsl(234, 67%, 53%)
HSVhsv(234, 75%, 85%)
CMYKcmyk(74.5%, 66.7%, 0%, 15.3%)
CIE-LABlab(38.56, 42.54, -75.29)
CIE-LCHlch(38.56, 86.47, 299.47°)
OKLaboklab(48.75% 0.0015 -0.2178)
OKLCHoklch(48.75% 0.218 270.4)
XYZxyz(16.2834, 10.4031, 66.1023)
Luminance0.1041 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3748D8 #D8C737
analogous
#3798D8 #3748D8 #7737D8
triadic
#3748D8 #D83748 #48D837
tetradic
#3748D8 #D83798 #D8C737 #37D877
square
#3748D8 #D83798 #D8C737 #37D877
split-complementary
#3748D8 #D87737 #98D837
monochromatic
#18237C #2231B0 #3748D8 #6A77E2 #9DA6EC

Accessibility & contrast

On white

6.82
#3748D8 on #FFFFFF
AA ✓AA large ✓AAA ✗

On black

3.08
#3748D8 on #000000
AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3748D8
6.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3748D8#FFFFFF#000000##FFFFFF
##3748D81.006.823.086.82
#FFFFFF6.821.0021.001.00
#0000003.0821.001.0021.00
##FFFFFF6.821.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0063DC
Deuteranopia (green-blind)
#0053D5
Tritanopia (blue-blind)
#006F8A
Achromatopsia (no color)
#5B5B5B

Design tokens & code

CSS
--color: #3748d8;
/* rgb */ color: rgb(55, 72, 216);
/* oklch */ color: oklch(48.8% 0.218 270.4);
Tailwind
colors: {
  custom: {
    50: '#867be5',
    500: '#3748d8',
    950: '#000000',
  },
}
SCSS
$custom: #3748d8;
$custom-light: #867be5;
$custom-dark: #000000;
JSON
{
  "hex": "#3748d8",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 216
  },
  "hsl": {
    "h": 233.665,
    "s": 67.364,
    "l": 53.137
  },
  "oklch": {
    "l": 0.48752,
    "c": 0.21783,
    "h": 270.4
  },
  "luminance": 0.10405
}

Semantic roles & 50–950 ramp

primary
#3748D8
secondary
#D8D193
accent
#D83EEA
background
#F9F7FE
surface
#F1EEFC
border
#CBC9D5
text
#0D0916
muted
#7E7B84

Preview Lab

Preview with #3748D8

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

Preview Lab → · Contrast checker → · Palette generator →

#3748D8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva