#3738B8#3738B8

#3738B8 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 43.1% C 0.195 H 274.2°. Best body text is #FFFFFF at 8.68:1 contrast (WCAG AA passes).

Color values

HEX#3738B8
RGBrgb(55, 56, 184)
HSLhsl(240, 54%, 47%)
HSVhsv(240, 70%, 72%)
CMYKcmyk(70.1%, 69.6%, 0%, 27.8%)
CIE-LABlab(32.03, 41.25, -67.36)
CIE-LCHlch(32.03, 78.98, 301.48°)
OKLaboklab(43.13% 0.0143 -0.1947)
OKLCHoklch(43.13% 0.195 274.2)
XYZxyz(11.6386, 7.1002, 46.0952)
Luminance0.0710 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3738B8 #B8B737
analogous
#3779B8 #3738B8 #7737B8
triadic
#3738B8 #B83738 #38B837
tetradic
#3738B8 #B83779 #B8B737 #37B877
square
#3738B8 #B83779 #B8B737 #37B877
split-complementary
#3738B8 #B87737 #79B837
monochromatic
#1B1B5A #292A89 #3738B8 #5D5ECF #8D8DDD

Accessibility & contrast

On white

8.68
#3738B8 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.42
#3738B8 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3738B8
8.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3738B8#FFFFFF#000000##FFFFFF
##3738B81.008.682.428.68
#FFFFFF8.681.0021.001.00
#0000002.4221.001.0021.00
##FFFFFF8.681.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0051BC
Deuteranopia (green-blind)
#0045B6
Tritanopia (blue-blind)
#005B74
Achromatopsia (no color)
#4B4B4B

Design tokens & code

CSS
--color: #3738b8;
/* rgb */ color: rgb(55, 56, 184);
/* oklch */ color: oklch(43.1% 0.195 274.2);
Tailwind
colors: {
  custom: {
    50: '#806fce',
    500: '#3738b8',
    950: '#000000',
  },
}
SCSS
$custom: #3738b8;
$custom-light: #806fce;
$custom-dark: #000000;
JSON
{
  "hex": "#3738b8",
  "rgb": {
    "r": 55,
    "g": 56,
    "b": 184
  },
  "hsl": {
    "h": 239.535,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.43132,
    "c": 0.1952,
    "h": 274.2
  },
  "luminance": 0.07101
}

Semantic roles & 50–950 ramp

primary
#3738B8
secondary
#C7C784
accent
#DC4ADD
background
#F8F6FC
surface
#F0ECF9
border
#CBC7D2
text
#0C0714
muted
#7D7A82

Preview Lab

Preview with #3738B8

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

Preview Lab → · Contrast checker → · Palette generator →

#3738B8 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva