#3747BC#3747BC

#3747BC is a mid, vivid blue. Relative luminance 0.089; OKLCH L 46.0% C 0.183 H 271.2°. Best body text is #FFFFFF at 7.53:1 contrast (WCAG AA passes).

Color values

HEX	#3747BC
RGB	rgb(55, 71, 188)
HSL	hsl(233, 55%, 48%)
HSV	hsv(233, 71%, 74%)
CMYK	cmyk(70.7%, 62.2%, 0%, 26.3%)
CIE-LAB	lab(35.88, 33.33, -63.41)
CIE-LCH	lch(35.88, 71.63, 297.73°)
OKLab	oklab(46.05% 0.0038 -0.183)
OKLCH	oklch(46.05% 0.183 271.2)
XYZ	xyz(12.9028, 8.9483, 48.6144)
Luminance	0.0895 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.57

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3747BC #BCAC37

analogous

#3789BC #3747BC #6937BC

triadic

#3747BC #BC3747 #47BC37

tetradic

#3747BC #BC3789 #BCAC37 #37BC69

square

#3747BC #BC3789 #BCAC37 #37BC69

split-complementary

#3747BC #BC6937 #89BC37

monochromatic

#1B235D #29358D #3747BC #606DD0 #8F99DE

Accessibility & contrast

On white

7.53

#3747BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#3747BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3747BC

7.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3747BC	#FFFFFF	#000000	##FFFFFF
##3747BC	1.00	7.53	2.79	7.53
#FFFFFF	7.53	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005BC0

Deuteranopia (green-blind)

#004EBA

Tritanopia (blue-blind)

#00657B

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3747bc;
/* rgb */ color: rgb(55, 71, 188);
/* oklch */ color: oklch(46.0% 0.183 271.2);

Tailwind

colors: {
  custom: {
    50: '#807ad1',
    500: '#3747bc',
    950: '#000000',
  },
}

SCSS

$custom: #3747bc;
$custom-light: #807ad1;
$custom-dark: #000000;

JSON

{
  "hex": "#3747bc",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 188
  },
  "hsl": {
    "h": 232.782,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.46048,
    "c": 0.18309,
    "h": 271.2
  },
  "luminance": 0.0895
}

Semantic roles & 50–950 ramp

primary

#3747BC

secondary

#C9C186

accent

#CC4ADE

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #3747BC

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

Preview Lab → · Contrast checker → · Palette generator →