#3748BF#3748BF

#3748BF is a mid, vivid blue. Relative luminance 0.092; OKLCH L 46.5% C 0.186 H 270.9°. Best body text is #FFFFFF at 7.39:1 contrast (WCAG AA passes).

Color values

HEX	#3748BF
RGB	rgb(55, 72, 191)
HSL	hsl(233, 55%, 48%)
HSV	hsv(233, 71%, 75%)
CMYK	cmyk(71.2%, 62.3%, 0%, 25.1%)
CIE-LAB	lab(36.38, 33.76, -64.36)
CIE-LCH	lch(36.38, 72.68, 297.68°)
OKLab	oklab(46.49% 0.003 -0.1858)
OKLCH	oklch(46.49% 0.186 270.9)
XYZ	xyz(13.2937, 9.2072, 50.3567)
Luminance	0.0921 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.61

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3748BF #BFAE37

analogous

#378CBF #3748BF #6A37BF

triadic

#3748BF #BF3748 #48BF37

tetradic

#3748BF #BF378C #BFAE37 #37BF6A

square

#3748BF #BF378C #BFAE37 #37BF6A

split-complementary

#3748BF #BF6A37 #8CBF37

monochromatic

#1C2460 #29368F #3748BF #6270D2 #919BDF

Accessibility & contrast

On white

7.39

#3748BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.84

#3748BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748BF

7.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748BF	#FFFFFF	#000000	##FFFFFF
##3748BF	1.00	7.39	2.84	7.39
#FFFFFF	7.39	1.00	21.00	1.00
#000000	2.84	21.00	1.00	21.00
##FFFFFF	7.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CC3

Deuteranopia (green-blind)

#004FBD

Tritanopia (blue-blind)

#00667D

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3748bf;
/* rgb */ color: rgb(55, 72, 191);
/* oklch */ color: oklch(46.5% 0.186 270.9);

Tailwind

colors: {
  custom: {
    50: '#807bd3',
    500: '#3748bf',
    950: '#000000',
  },
}

SCSS

$custom: #3748bf;
$custom-light: #807bd3;
$custom-dark: #000000;

JSON

{
  "hex": "#3748bf",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 191
  },
  "hsl": {
    "h": 232.5,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.46491,
    "c": 0.18584,
    "h": 270.9
  },
  "luminance": 0.09209
}

Semantic roles & 50–950 ramp

primary

#3748BF

secondary

#CAC288

accent

#CC49DF

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #3748BF

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

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