#3748BD#3748BD

#3748BD is a mid, vivid blue. Relative luminance 0.091; OKLCH L 46.3% C 0.183 H 271.0°. Best body text is #FFFFFF at 7.44:1 contrast (WCAG AA passes).

Color values

HEX	#3748BD
RGB	rgb(55, 72, 189)
HSL	hsl(232, 55%, 48%)
HSV	hsv(232, 71%, 74%)
CMYK	cmyk(70.9%, 61.9%, 0%, 25.9%)
CIE-LAB	lab(36.21, 33.05, -63.45)
CIE-LCH	lch(36.21, 71.55, 297.51°)
OKLab	oklab(46.32% 0.0031 -0.1832)
OKLCH	oklch(46.32% 0.183 271)
XYZ	xyz(13.0751, 9.1198, 49.2055)
Luminance	0.0912 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3748BD #BDAC37

analogous

#378BBD #3748BD #6937BD

triadic

#3748BD #BD3748 #48BD37

tetradic

#3748BD #BD378B #BDAC37 #37BD69

square

#3748BD #BD378B #BDAC37 #37BD69

split-complementary

#3748BD #BD6937 #8BBD37

monochromatic

#1B245E #29368E #3748BD #606FD1 #909ADF

Accessibility & contrast

On white

7.44

#3748BD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.82

#3748BD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748BD

7.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748BD	#FFFFFF	#000000	##FFFFFF
##3748BD	1.00	7.44	2.82	7.44
#FFFFFF	7.44	1.00	21.00	1.00
#000000	2.82	21.00	1.00	21.00
##FFFFFF	7.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CC1

Deuteranopia (green-blind)

#004FBB

Tritanopia (blue-blind)

#00667B

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #3748bd;
/* rgb */ color: rgb(55, 72, 189);
/* oklch */ color: oklch(46.3% 0.183 271.0);

Tailwind

colors: {
  custom: {
    50: '#807bd2',
    500: '#3748bd',
    950: '#000000',
  },
}

SCSS

$custom: #3748bd;
$custom-light: #807bd2;
$custom-dark: #000000;

JSON

{
  "hex": "#3748bd",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 189
  },
  "hsl": {
    "h": 232.388,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.46317,
    "c": 0.18321,
    "h": 271
  },
  "luminance": 0.09121
}

Semantic roles & 50–950 ramp

primary

#3748BD

secondary

#C9C186

accent

#CB4ADE

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #3748BD

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

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