#3733B1#3733B1

#3733B1 is a dark, vivid blue. Relative luminance 0.064; OKLCH L 41.7% C 0.192 H 275.5°. Best body text is #FFFFFF at 9.25:1 contrast (WCAG AA passes).

Color values

HEX#3733B1
RGBrgb(55, 51, 177)
HSLhsl(242, 55%, 45%)
HSVhsv(242, 71%, 69%)
CMYKcmyk(68.9%, 71.2%, 0%, 30.6%)
CIE-LABlab(30.29, 41.86, -66.07)
CIE-LCHlch(30.29, 78.22, 302.36°)
OKLaboklab(41.68% 0.0185 -0.1909)
OKLCHoklch(41.68% 0.192 275.5)
XYZxyz(10.6926, 6.3532, 42.2492)
Luminance0.0635 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3733B1 #ADB133
analogous
#336EB1 #3733B1 #7633B1
triadic
#3733B1 #B13733 #33B137
tetradic
#3733B1 #B1336E #ADB133 #33B176
square
#3733B1 #B1336E #ADB133 #33B176
split-complementary
#3733B1 #B17633 #6EB133
monochromatic
#191852 #282581 #3733B1 #5754CE #8683DB

Accessibility & contrast

On white

9.25
#3733B1 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.27
#3733B1 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3733B1
9.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3733B1#FFFFFF#000000##FFFFFF
##3733B11.009.252.279.25
#FFFFFF9.251.0021.001.00
#0000002.2721.001.0021.00
##FFFFFF9.251.0021.001.00

Color blindness preview

Protanopia (red-blind)
#004DB5
Deuteranopia (green-blind)
#0042AF
Tritanopia (blue-blind)
#00566E
Achromatopsia (no color)
#474747

Design tokens & code

CSS
--color: #3733b1;
/* rgb */ color: rgb(55, 51, 177);
/* oklch */ color: oklch(41.7% 0.192 275.5);
Tailwind
colors: {
  custom: {
    50: '#7f6cc9',
    500: '#3733b1',
    950: '#000000',
  },
}
SCSS
$custom: #3733b1;
$custom-light: #7f6cc9;
$custom-dark: #000000;
JSON
{
  "hex": "#3733b1",
  "rgb": {
    "r": 55,
    "g": 51,
    "b": 177
  },
  "hsl": {
    "h": 241.905,
    "s": 55.263,
    "l": 44.706
  },
  "oklch": {
    "l": 0.41675,
    "c": 0.19181,
    "h": 275.5
  },
  "luminance": 0.06354
}

Semantic roles & 50–950 ramp

primary
#3733B1
secondary
#C2C57B
accent
#DF49DA
background
#F8F6FC
surface
#F0EBF8
border
#CBC6D1
text
#0B0713
muted
#7C7A82

Preview Lab

Preview with #3733B1

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

Preview Lab → · Contrast checker → · Palette generator →

#3733B1 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva