#3748BC#3748BC

#3748BC is a mid, vivid blue. Relative luminance 0.091; OKLCH L 46.2% C 0.182 H 271.0°. Best body text is #FFFFFF at 7.46:1 contrast (WCAG AA passes).

Color values

HEX	#3748BC
RGB	rgb(55, 72, 188)
HSL	hsl(232, 55%, 48%)
HSV	hsv(232, 71%, 74%)
CMYK	cmyk(70.7%, 61.7%, 0%, 26.3%)
CIE-LAB	lab(36.13, 32.69, -63.00)
CIE-LCH	lch(36.13, 70.98, 297.43°)
OKLab	oklab(46.23% 0.0031 -0.1819)
OKLCH	oklch(46.23% 0.182 271)
XYZ	xyz(12.9669, 9.0765, 48.6358)
Luminance	0.0908 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3748BC #BCAB37

analogous

#378ABC #3748BC #6937BC

triadic

#3748BC #BC3748 #48BC37

tetradic

#3748BC #BC378A #BCAB37 #37BC69

square

#3748BC #BC378A #BCAB37 #37BC69

split-complementary

#3748BC #BC6937 #8ABC37

monochromatic

#1B245D #29368D #3748BC #606ED0 #8F99DE

Accessibility & contrast

On white

7.46

#3748BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#3748BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748BC

7.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748BC	#FFFFFF	#000000	##FFFFFF
##3748BC	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)

#005BC0

Deuteranopia (green-blind)

#004FBA

Tritanopia (blue-blind)

#00667B

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3748bc;
/* rgb */ color: rgb(55, 72, 188);
/* oklch */ color: oklch(46.2% 0.182 271.0);

Tailwind

colors: {
  custom: {
    50: '#7f7bd1',
    500: '#3748bc',
    950: '#000000',
  },
}

SCSS

$custom: #3748bc;
$custom-light: #7f7bd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3748bc",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 188
  },
  "hsl": {
    "h": 232.331,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.4623,
    "c": 0.18188,
    "h": 271
  },
  "luminance": 0.09078
}

Semantic roles & 50–950 ramp

primary

#3748BC

secondary

#C9C086

accent

#CB4ADE

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #3748BC

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

Preview Lab → · Contrast checker → · Palette generator →