#3728A3#3728A3

#3728A3 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 38.7% C 0.186 H 278.7°. Best body text is #FFFFFF at 10.53:1 contrast (WCAG AA passes).

Color values

HEX#3728A3
RGBrgb(55, 40, 163)
HSLhsl(247, 61%, 40%)
HSVhsv(247, 75%, 64%)
CMYKcmyk(66.3%, 75.5%, 0%, 36.1%)
CIE-LABlab(26.66, 43.54, -63.63)
CIE-LCHlch(26.66, 77.10, 304.38°)
OKLaboklab(38.67% 0.0281 -0.1837)
OKLCHoklch(38.67% 0.186 278.7)
XYZxyz(8.9431, 4.9734, 35.1319)
Luminance0.0497 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3728A3 #94A328
analogous
#2857A3 #3728A3 #7528A3
triadic
#3728A3 #A33728 #28A337
tetradic
#3728A3 #A32857 #94A328 #28A375
square
#3728A3 #A32857 #94A328 #28A375
split-complementary
#3728A3 #A37528 #57A328
monochromatic
#161041 #261C72 #3728A3 #4C3ACF #786BDB

Accessibility & contrast

On white

10.53
#3728A3 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

1.99
#3728A3 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3728A3
10.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3728A3#FFFFFF#000000##FFFFFF
##3728A31.0010.531.9910.53
#FFFFFF10.531.0021.001.00
#0000001.9921.001.0021.00
##FFFFFF10.531.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0044A7
Deuteranopia (green-blind)
#003AA1
Tritanopia (blue-blind)
#004B64
Achromatopsia (no color)
#3F3F3F

Design tokens & code

CSS
--color: #3728a3;
/* rgb */ color: rgb(55, 40, 163);
/* oklch */ color: oklch(38.7% 0.186 278.7);
Tailwind
colors: {
  custom: {
    50: '#7d64bf',
    500: '#3728a3',
    950: '#000000',
  },
}
SCSS
$custom: #3728a3;
$custom-light: #7d64bf;
$custom-dark: #000000;
JSON
{
  "hex": "#3728a3",
  "rgb": {
    "r": 55,
    "g": 40,
    "b": 163
  },
  "hsl": {
    "h": 247.317,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.38675,
    "c": 0.18585,
    "h": 278.7
  },
  "luminance": 0.04974
}

Semantic roles & 50–950 ramp

primary
#3728A3
secondary
#B6C166
accent
#E444D0
background
#F8F6FB
surface
#EFEBF7
border
#CAC6D0
text
#0B0612
muted
#7C7A81

Preview Lab

Preview with #3728A3

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

Preview Lab → · Contrast checker → · Palette generator →

#3728A3 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva