#3737C4#3737C4

#3737C4 is a dark, highly saturated blue. Relative luminance 0.075; OKLCH L 44.2% C 0.211 H 273.6°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX#3737C4
RGBrgb(55, 55, 196)
HSLhsl(240, 56%, 49%)
HSVhsv(240, 72%, 77%)
CMYKcmyk(71.9%, 71.9%, 0%, 23.1%)
CIE-LABlab(32.98, 45.84, -72.86)
CIE-LCHlch(32.98, 86.08, 302.18°)
OKLaboklab(44.16% 0.0131 -0.2107)
OKLCHoklch(44.16% 0.211 273.6)
XYZxyz(12.9022, 7.5288, 52.9871)
Luminance0.0753 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3737C4 #C4C437
analogous
#377EC4 #3737C4 #7E37C4
triadic
#3737C4 #C43737 #37C437
tetradic
#3737C4 #C4377E #C4C437 #37C47E
square
#3737C4 #C4377E #C4C437 #37C47E
split-complementary
#3737C4 #C47E37 #7EC437
monochromatic
#1C1C64 #2A2A94 #3737C4 #6565D4 #9494E1

Accessibility & contrast

On white

8.38
#3737C4 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.51
#3737C4 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3737C4
8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3737C4#FFFFFF#000000##FFFFFF
##3737C41.008.382.518.38
#FFFFFF8.381.0021.001.00
#0000002.5121.001.0021.00
##FFFFFF8.381.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0054C8
Deuteranopia (green-blind)
#0047C1
Tritanopia (blue-blind)
#005F7A
Achromatopsia (no color)
#4E4E4E

Design tokens & code

CSS
--color: #3737c4;
/* rgb */ color: rgb(55, 55, 196);
/* oklch */ color: oklch(44.2% 0.211 273.6);
Tailwind
colors: {
  custom: {
    50: '#836fd7',
    500: '#3737c4',
    950: '#000000',
  },
}
SCSS
$custom: #3737c4;
$custom-light: #836fd7;
$custom-dark: #000000;
JSON
{
  "hex": "#3737c4",
  "rgb": {
    "r": 55,
    "g": 55,
    "b": 196
  },
  "hsl": {
    "h": 240,
    "s": 56.175,
    "l": 49.216
  },
  "oklch": {
    "l": 0.44162,
    "c": 0.21116,
    "h": 273.6
  },
  "luminance": 0.0753
}

Semantic roles & 50–950 ramp

primary
#3737C4
secondary
#CCCC8B
accent
#DF48DF
background
#F8F6FD
surface
#F0ECFA
border
#CBC7D3
text
#0C0715
muted
#7D7A83

Preview Lab

Preview with #3737C4

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

Preview Lab → · Contrast checker → · Palette generator →

#3737C4 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva