#3937C9#3937C9

#3937C9 is a dark, highly saturated blue. Relative luminance 0.078; OKLCH L 44.8% C 0.217 H 273.9°. Best body text is #FFFFFF at 8.19:1 contrast (WCAG AA passes).

Color values

HEX#3937C9
RGBrgb(57, 55, 201)
HSLhsl(241, 57%, 50%)
HSVhsv(241, 73%, 79%)
CMYKcmyk(71.6%, 72.6%, 0%, 21.2%)
CIE-LABlab(33.60, 47.68, -74.76)
CIE-LCHlch(33.60, 88.67, 302.53°)
OKLaboklab(44.78% 0.0146 -0.2162)
OKLCHoklch(44.78% 0.217 273.9)
XYZxyz(13.5926, 7.8179, 56.0397)
Luminance0.0782 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3937C9 #C7C937
analogous
#377EC9 #3937C9 #8237C9
triadic
#3937C9 #C93937 #37C939
tetradic
#3937C9 #C9377E #C7C937 #37C982
square
#3937C9 #C9377E #C7C937 #37C982
split-complementary
#3937C9 #C98237 #7EC937
monochromatic
#1D1C69 #2B2999 #3937C9 #6967D6 #9897E3

Accessibility & contrast

On white

8.19
#3937C9 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.56
#3937C9 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3937C9
8.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3937C9#FFFFFF#000000##FFFFFF
##3937C91.008.192.568.19
#FFFFFF8.191.0021.001.00
#0000002.5621.001.0021.00
##FFFFFF8.191.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0056CD
Deuteranopia (green-blind)
#0048C6
Tritanopia (blue-blind)
#00617D
Achromatopsia (no color)
#4F4F4F

Design tokens & code

CSS
--color: #3937c9;
/* rgb */ color: rgb(57, 55, 201);
/* oklch */ color: oklch(44.8% 0.217 273.9);
Tailwind
colors: {
  custom: {
    50: '#856fdb',
    500: '#3937c9',
    950: '#000000',
  },
}
SCSS
$custom: #3937c9;
$custom-light: #856fdb;
$custom-dark: #000000;
JSON
{
  "hex": "#3937c9",
  "rgb": {
    "r": 57,
    "g": 55,
    "b": 201
  },
  "hsl": {
    "h": 240.822,
    "s": 57.48,
    "l": 50.196
  },
  "oklch": {
    "l": 0.44784,
    "c": 0.21672,
    "h": 273.9
  },
  "luminance": 0.07819
}

Semantic roles & 50–950 ramp

primary
#3937C9
secondary
#CECF8D
accent
#E147DF
background
#F9F6FD
surface
#F1ECFB
border
#CBC7D4
text
#0D0715
muted
#7E7A83

Preview Lab

Preview with #3937C9

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

Preview Lab → · Contrast checker → · Palette generator →

#3937C9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva