#3739B6#3739B6

#3739B6 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 43.1% C 0.192 H 274.2°. Best body text is #FFFFFF at 8.67:1 contrast (WCAG AA passes).

Color values

HEX#3739B6
RGBrgb(55, 57, 182)
HSLhsl(239, 54%, 46%)
HSVhsv(239, 70%, 71%)
CMYKcmyk(69.8%, 68.7%, 0%, 28.6%)
CIE-LABlab(32.07, 39.97, -66.12)
CIE-LCHlch(32.07, 77.26, 301.15°)
OKLaboklab(43.1% 0.0139 -0.1911)
OKLCHoklch(43.1% 0.192 274.2)
XYZxyz(11.4794, 7.1148, 45.0152)
Luminance0.0712 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3739B6 #B6B437
analogous
#3779B6 #3739B6 #7537B6
triadic
#3739B6 #B63739 #39B637
tetradic
#3739B6 #B63779 #B6B437 #37B675
square
#3739B6 #B63779 #B6B437 #37B675
split-complementary
#3739B6 #B67537 #79B637
monochromatic
#1B1C58 #292A87 #3739B6 #5C5ECE #8B8DDC

Accessibility & contrast

On white

8.67
#3739B6 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.42
#3739B6 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3739B6
8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3739B6#FFFFFF#000000##FFFFFF
##3739B61.008.672.428.67
#FFFFFF8.671.0021.001.00
#0000002.4221.001.0021.00
##FFFFFF8.671.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0051BA
Deuteranopia (green-blind)
#0046B4
Tritanopia (blue-blind)
#005B73
Achromatopsia (no color)
#4B4B4B

Design tokens & code

CSS
--color: #3739b6;
/* rgb */ color: rgb(55, 57, 182);
/* oklch */ color: oklch(43.1% 0.192 274.2);
Tailwind
colors: {
  custom: {
    50: '#7f70cd',
    500: '#3739b6',
    950: '#000000',
  },
}
SCSS
$custom: #3739b6;
$custom-light: #7f70cd;
$custom-dark: #000000;
JSON
{
  "hex": "#3739b6",
  "rgb": {
    "r": 55,
    "g": 57,
    "b": 182
  },
  "hsl": {
    "h": 239.055,
    "s": 53.586,
    "l": 46.471
  },
  "oklch": {
    "l": 0.43099,
    "c": 0.19157,
    "h": 274.2
  },
  "luminance": 0.07116
}

Semantic roles & 50–950 ramp

primary
#3739B6
secondary
#C6C582
accent
#DB4BDD
background
#F8F6FC
surface
#F0ECF9
border
#CBC7D2
text
#0C0714
muted
#7D7A82

Preview Lab

Preview with #3739B6

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

Preview Lab → · Contrast checker → · Palette generator →

#3739B6 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva