#3743BE#3743BE

#3743BE is a mid, vivid blue. Relative luminance 0.085; OKLCH L 45.5% C 0.190 H 272.0°. Best body text is #FFFFFF at 7.75:1 contrast (WCAG AA passes).

Color values

HEX#3743BE
RGBrgb(55, 67, 190)
HSLhsl(235, 55%, 48%)
HSVhsv(235, 71%, 75%)
CMYKcmyk(71.1%, 64.7%, 0%, 25.5%)
CIE-LABlab(35.09, 36.57, -65.88)
CIE-LCHlch(35.09, 75.35, 299.03°)
OKLaboklab(45.52% 0.0065 -0.1903)
OKLCHoklch(45.52% 0.19 272)
XYZxyz(12.8738, 8.5430, 49.6757)
Luminance0.0854 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#3743BE #BEB237
analogous
#3786BE #3743BE #6F37BE
triadic
#3743BE #BE3743 #43BE37
tetradic
#3743BE #BE3786 #BEB237 #37BE6F
square
#3743BE #BE3786 #BEB237 #37BE6F
split-complementary
#3743BE #BE6F37 #86BE37
monochromatic
#1C225F #29328F #3743BE #616BD1 #9097DF

Accessibility & contrast

On white

7.75
#3743BE on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.71
#3743BE on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3743BE
7.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##3743BE#FFFFFF#000000##FFFFFF
##3743BE1.007.752.717.75
#FFFFFF7.751.0021.001.00
#0000002.7121.001.0021.00
##FFFFFF7.751.0021.001.00

Color blindness preview

Protanopia (red-blind)
#0059C2
Deuteranopia (green-blind)
#004CBC
Tritanopia (blue-blind)
#00637A
Achromatopsia (no color)
#535353

Design tokens & code

CSS
--color: #3743be;
/* rgb */ color: rgb(55, 67, 190);
/* oklch */ color: oklch(45.5% 0.190 272.0);
Tailwind
colors: {
  custom: {
    50: '#8077d3',
    500: '#3743be',
    950: '#000000',
  },
}
SCSS
$custom: #3743be;
$custom-light: #8077d3;
$custom-dark: #000000;
JSON
{
  "hex": "#3743be",
  "rgb": {
    "r": 55,
    "g": 67,
    "b": 190
  },
  "hsl": {
    "h": 234.667,
    "s": 55.102,
    "l": 48.039
  },
  "oklch": {
    "l": 0.45516,
    "c": 0.19044,
    "h": 272
  },
  "luminance": 0.08544
}

Semantic roles & 50–950 ramp

primary
#3743BE
secondary
#CAC487
accent
#D149DE
background
#F8F7FD
surface
#F0EDFA
border
#CBC8D3
text
#0C0814
muted
#7D7B83

Preview Lab

Preview with #3743BE

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

Preview Lab → · Contrast checker → · Palette generator →

#3743BE Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva