#3728AA#3728AA

#3728AA is a dark, vivid blue. Relative luminance 0.052; OKLCH L 39.4% C 0.194 H 277.8°. Best body text is #FFFFFF at 10.26:1 contrast (WCAG AA passes).

Color values

HEX#3728AA
RGBrgb(55, 40, 170)
HSLhsl(247, 62%, 41%)
HSVhsv(247, 76%, 67%)
CMYKcmyk(67.6%, 76.5%, 0%, 33.3%)
CIE-LABlab(27.38, 45.75, -66.66)
CIE-LCHlch(27.38, 80.85, 304.46°)
OKLaboklab(39.4% 0.0264 -0.1926)
OKLCHoklch(39.4% 0.194 277.8)
XYZxyz(9.5877, 5.2313, 38.5269)
Luminance0.0523 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3728AA #9BAA28
analogous
#285AAA #3728AA #7828AA
triadic
#3728AA #AA3728 #28AA37
tetradic
#3728AA #AA285A #9BAA28 #28AA78
square
#3728AA #AA285A #9BAA28 #28AA78
split-complementary
#3728AA #AA7828 #5AAA28
monochromatic
#171147 #271C78 #3728AA #4F3ED2 #7C6FDD

Accessibility & contrast

On white

10.26
#3728AA on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.05
#3728AA on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3728AA
10.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3728AA#FFFFFF#000000##FFFFFF
##3728AA1.0010.262.0510.26
#FFFFFF10.261.0021.001.00
#0000002.0521.001.0021.00
##FFFFFF10.261.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0046AE
Deuteranopia (green-blind)
#003BA8
Tritanopia (blue-blind)
#004E67
Achromatopsia (no color)
#414141

Design tokens & code

CSS
--color: #3728aa;
/* rgb */ color: rgb(55, 40, 170);
/* oklch */ color: oklch(39.4% 0.194 277.8);
Tailwind
colors: {
  custom: {
    50: '#7e65c5',
    500: '#3728aa',
    950: '#000000',
  },
}
SCSS
$custom: #3728aa;
$custom-light: #7e65c5;
$custom-dark: #000000;
JSON
{
  "hex": "#3728aa",
  "rgb": {
    "r": 55,
    "g": 40,
    "b": 170
  },
  "hsl": {
    "h": 246.923,
    "s": 61.905,
    "l": 41.176
  },
  "oklch": {
    "l": 0.39403,
    "c": 0.19438,
    "h": 277.8
  },
  "luminance": 0.05232
}

Semantic roles & 50–950 ramp

primary
#3728AA
secondary
#BAC46A
accent
#E543D2
background
#F8F6FC
surface
#EFEBF8
border
#CAC6D1
text
#0B0613
muted
#7C7A82

Preview Lab

Preview with #3728AA

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

Preview Lab → · Contrast checker → · Palette generator →

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