#3729B2#3729B2

#3729B2 is a dark, highly saturated blue. Relative luminance 0.056; OKLCH L 40.4% C 0.203 H 276.8°. Best body text is #FFFFFF at 9.89:1 contrast (WCAG AA passes).

Color values

HEX#3729B2
RGBrgb(55, 41, 178)
HSLhsl(246, 63%, 43%)
HSVhsv(246, 77%, 70%)
CMYKcmyk(69.1%, 77%, 0%, 30.2%)
CIE-LABlab(28.41, 47.74, -69.76)
CIE-LCHlch(28.41, 84.53, 304.38°)
OKLaboklab(40.37% 0.024 -0.2016)
OKLCHoklch(40.37% 0.203 276.8)
XYZxyz(10.4017, 5.6115, 42.6458)
Luminance0.0561 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3729B2 #A4B229
analogous
#2960B2 #3729B2 #7B29B2
triadic
#3729B2 #B23729 #29B237
tetradic
#3729B2 #B22960 #A4B229 #29B27B
square
#3729B2 #B22960 #A4B229 #29B27B
split-complementary
#3729B2 #B27B29 #60B229
monochromatic
#18124F #281E80 #3729B2 #5344D4 #8176DF

Accessibility & contrast

On white

9.89
#3729B2 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.12
#3729B2 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3729B2
9.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3729B2#FFFFFF#000000##FFFFFF
##3729B21.009.892.129.89
#FFFFFF9.891.0021.001.00
#0000002.1221.001.0021.00
##FFFFFF9.891.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0049B6
Deuteranopia (green-blind)
#003DB0
Tritanopia (blue-blind)
#00526C
Achromatopsia (no color)
#434343

Design tokens & code

CSS
--color: #3729b2;
/* rgb */ color: rgb(55, 41, 178);
/* oklch */ color: oklch(40.4% 0.203 276.8);
Tailwind
colors: {
  custom: {
    50: '#8066ca',
    500: '#3729b2',
    950: '#000000',
  },
}
SCSS
$custom: #3729b2;
$custom-light: #8066ca;
$custom-dark: #000000;
JSON
{
  "hex": "#3729b2",
  "rgb": {
    "r": 55,
    "g": 41,
    "b": 178
  },
  "hsl": {
    "h": 246.131,
    "s": 62.557,
    "l": 42.941
  },
  "oklch": {
    "l": 0.40374,
    "c": 0.20303,
    "h": 276.8
  },
  "luminance": 0.05612
}

Semantic roles & 50–950 ramp

primary
#3729B2
secondary
#BEC770
accent
#E642D5
background
#F8F6FC
surface
#F0EBF9
border
#CBC6D2
text
#0C0613
muted
#7D7A82

Preview Lab

Preview with #3729B2

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

Preview Lab → · Contrast checker → · Palette generator →

#3729B2 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva