#3739BA#3739BA

#3739BA is a dark, vivid blue. Relative luminance 0.073; OKLCH L 43.5% C 0.197 H 273.9°. Best body text is #FFFFFF at 8.55:1 contrast (WCAG AA passes).

Color values

HEX#3739BA
RGBrgb(55, 57, 186)
HSLhsl(239, 54%, 47%)
HSVhsv(239, 70%, 73%)
CMYKcmyk(70.4%, 69.4%, 0%, 27.1%)
CIE-LABlab(32.44, 41.33, -67.87)
CIE-LCHlch(32.44, 79.46, 301.34°)
OKLaboklab(43.48% 0.0134 -0.1962)
OKLCHoklch(43.48% 0.197 273.9)
XYZxyz(11.8987, 7.2825, 47.2235)
Luminance0.0728 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3739BA #BAB837
analogous
#377BBA #3739BA #7737BA
triadic
#3739BA #BA3739 #39BA37
tetradic
#3739BA #BA377B #BAB837 #37BA77
square
#3739BA #BA377B #BAB837 #37BA77
split-complementary
#3739BA #BA7737 #7BBA37
monochromatic
#1B1C5C #292B8B #3739BA #5F60D0 #8E8FDE

Accessibility & contrast

On white

8.55
#3739BA on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.46
#3739BA on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739BA
8.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3739BA#FFFFFF#000000##FFFFFF
##3739BA1.008.552.468.55
#FFFFFF8.551.0021.001.00
#0000002.4621.001.0021.00
##FFFFFF8.551.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0052BE
Deuteranopia (green-blind)
#0046B8
Tritanopia (blue-blind)
#005C75
Achromatopsia (no color)
#4C4C4C

Design tokens & code

CSS
--color: #3739ba;
/* rgb */ color: rgb(55, 57, 186);
/* oklch */ color: oklch(43.5% 0.197 273.9);
Tailwind
colors: {
  custom: {
    50: '#8070d0',
    500: '#3739ba',
    950: '#000000',
  },
}
SCSS
$custom: #3739ba;
$custom-light: #8070d0;
$custom-dark: #000000;
JSON
{
  "hex": "#3739ba",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 186
  },
  "hsl": {
    "h": 239.084,
    "s": 54.357,
    "l": 47.255
  },
  "oklch": {
    "l": 0.43483,
    "c": 0.19664,
    "h": 273.9
  },
  "luminance": 0.07284
}

Semantic roles & 50–950 ramp

primary
#3739BA
secondary
#C8C785
accent
#DB4ADE
background
#F8F6FC
surface
#F0ECF9
border
#CBC7D2
text
#0C0714
muted
#7D7A82

Preview Lab

Preview with #3739BA

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

Preview Lab → · Contrast checker → · Palette generator →

#3739BA Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva