#3747BD#3747BD

#3747BD is a mid, vivid blue. Relative luminance 0.090; OKLCH L 46.1% C 0.184 H 271.2°. Best body text is #FFFFFF at 7.50:1 contrast (WCAG AA passes).

Color values

HEX	#3747BD
RGB	rgb(55, 71, 189)
HSL	hsl(233, 55%, 48%)
HSV	hsv(233, 71%, 74%)
CMYK	cmyk(70.9%, 62.4%, 0%, 25.9%)
CIE-LAB	lab(35.97, 33.69, -63.86)
CIE-LCH	lch(35.97, 72.20, 297.81°)
OKLab	oklab(46.14% 0.0038 -0.1844)
OKLCH	oklch(46.14% 0.184 271.2)
XYZ	xyz(13.0110, 8.9915, 49.1841)
Luminance	0.0899 (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

#3747BD #BDAD37

analogous

#378ABD #3747BD #6A37BD

triadic

#3747BD #BD3747 #47BD37

tetradic

#3747BD #BD378A #BDAD37 #37BD6A

square

#3747BD #BD378A #BDAD37 #37BD6A

split-complementary

#3747BD #BD6A37 #8ABD37

monochromatic

#1B235E #29358E #3747BD #606ED1 #9099DF

Accessibility & contrast

On white

7.50

#3747BD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#3747BD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3747BD

7.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3747BD	#FFFFFF	#000000	##FFFFFF
##3747BD	1.00	7.50	2.80	7.50
#FFFFFF	7.50	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BC1

Deuteranopia (green-blind)

#004FBB

Tritanopia (blue-blind)

#00657B

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3747bd;
/* rgb */ color: rgb(55, 71, 189);
/* oklch */ color: oklch(46.1% 0.184 271.2);

Tailwind

colors: {
  custom: {
    50: '#807ad2',
    500: '#3747bd',
    950: '#000000',
  },
}

SCSS

$custom: #3747bd;
$custom-light: #807ad2;
$custom-dark: #000000;

JSON

{
  "hex": "#3747bd",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 189
  },
  "hsl": {
    "h": 232.836,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.46135,
    "c": 0.18441,
    "h": 271.2
  },
  "luminance": 0.08993
}

Semantic roles & 50–950 ramp

primary

#3747BD

secondary

#C9C186

accent

#CC4ADE

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #3747BD

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

Preview Lab → · Contrast checker → · Palette generator →