#3931BB#3931BB

#3931BB is a dark, highly saturated blue. Relative luminance 0.067; OKLCH L 42.5% C 0.206 H 275.7°. Best body text is #FFFFFF at 9.01:1 contrast (WCAG AA passes).

Color values

HEX#3931BB
RGBrgb(57, 49, 187)
HSLhsl(243, 58%, 46%)
HSVhsv(243, 74%, 73%)
CMYKcmyk(69.5%, 73.8%, 0%, 26.7%)
CIE-LABlab(31.00, 46.49, -70.82)
CIE-LCHlch(31.00, 84.72, 303.28°)
OKLaboklab(42.52% 0.0204 -0.2047)
OKLCHoklch(42.52% 0.206 275.7)
XYZxyz(11.7523, 6.6532, 47.6689)
Luminance0.0665 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3931BB #B3BB31
analogous
#316EBB #3931BB #7E31BB
triadic
#3931BB #BB3931 #31BB39
tetradic
#3931BB #BB316E #B3BB31 #31BB7E
square
#3931BB #BB316E #B3BB31 #31BB7E
split-complementary
#3931BB #BB7E31 #6EBB31
monochromatic
#1B185A #2A248B #3931BB #5E56D3 #8C87E0

Accessibility & contrast

On white

9.01
#3931BB on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.33
#3931BB on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3931BB
9.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3931BB#FFFFFF#000000##FFFFFF
##3931BB1.009.012.339.01
#FFFFFF9.011.0021.001.00
#0000002.3321.001.0021.00
##FFFFFF9.011.0021.001.00

Color blindness preview

Protanopia (red-blind)
#004FBF
Deuteranopia (green-blind)
#0043B9
Tritanopia (blue-blind)
#005873
Achromatopsia (no color)
#494949

Design tokens & code

CSS
--color: #3931bb;
/* rgb */ color: rgb(57, 49, 187);
/* oklch */ color: oklch(42.5% 0.206 275.7);
Tailwind
colors: {
  custom: {
    50: '#826bd1',
    500: '#3931bb',
    950: '#000000',
  },
}
SCSS
$custom: #3931bb;
$custom-light: #826bd1;
$custom-dark: #000000;
JSON
{
  "hex": "#3931bb",
  "rgb": {
    "r": 57,
    "g": 49,
    "b": 187
  },
  "hsl": {
    "h": 243.478,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.42519,
    "c": 0.20573,
    "h": 275.7
  },
  "luminance": 0.06654
}

Semantic roles & 50–950 ramp

primary
#3931BB
secondary
#C5C97F
accent
#E246D9
background
#F8F6FD
surface
#F0EBFA
border
#CBC6D3
text
#0C0714
muted
#7D7A83

Preview Lab

Preview with #3931BB

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

Preview Lab → · Contrast checker → · Palette generator →

#3931BB Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva