#3747BF#3747BF

#3747BF is a mid, vivid blue. Relative luminance 0.091; OKLCH L 46.3% C 0.187 H 271.1°. Best body text is #FFFFFF at 7.46:1 contrast (WCAG AA passes).

Color values

HEX	#3747BF
RGB	rgb(55, 71, 191)
HSL	hsl(233, 55%, 48%)
HSV	hsv(233, 71%, 75%)
CMYK	cmyk(71.2%, 62.8%, 0%, 25.1%)
CIE-LAB	lab(36.14, 34.40, -64.75)
CIE-LCH	lch(36.14, 73.32, 297.98°)
OKLab	oklab(46.31% 0.0037 -0.187)
OKLCH	oklch(46.31% 0.187 271.1)
XYZ	xyz(13.2296, 9.0790, 50.3353)
Luminance	0.0908 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3747BF #BFAF37

analogous

#378BBF #3747BF #6B37BF

triadic

#3747BF #BF3747 #47BF37

tetradic

#3747BF #BF378B #BFAF37 #37BF6B

square

#3747BF #BF378B #BFAF37 #37BF6B

split-complementary

#3747BF #BF6B37 #8BBF37

monochromatic

#1C2460 #29358F #3747BF #626FD2 #919ADF

Accessibility & contrast

On white

7.46

#3747BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#3747BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3747BF

7.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3747BF	#FFFFFF	#000000	##FFFFFF
##3747BF	1.00	7.46	2.82	7.46
#FFFFFF	7.46	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BC3

Deuteranopia (green-blind)

#004FBD

Tritanopia (blue-blind)

#00667C

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3747bf;
/* rgb */ color: rgb(55, 71, 191);
/* oklch */ color: oklch(46.3% 0.187 271.1);

Tailwind

colors: {
  custom: {
    50: '#807ad3',
    500: '#3747bf',
    950: '#000000',
  },
}

SCSS

$custom: #3747bf;
$custom-light: #807ad3;
$custom-dark: #000000;

JSON

{
  "hex": "#3747bf",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 191
  },
  "hsl": {
    "h": 232.941,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.46311,
    "c": 0.18704,
    "h": 271.1
  },
  "luminance": 0.0908
}

Semantic roles & 50–950 ramp

primary

#3747BF

secondary

#CAC288

accent

#CD49DF

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #3747BF

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

Preview Lab → · Contrast checker → · Palette generator →