#3748C1#3748C1

#3748C1 is a mid, vivid blue. Relative luminance 0.093; OKLCH L 46.7% C 0.188 H 270.9°. Best body text is #FFFFFF at 7.34:1 contrast (WCAG AA passes).

Color values

HEX	#3748C1
RGB	rgb(55, 72, 193)
HSL	hsl(233, 56%, 49%)
HSV	hsv(233, 72%, 76%)
CMYK	cmyk(71.5%, 62.7%, 0%, 24.3%)
CIE-LAB	lab(36.55, 34.48, -65.25)
CIE-LCH	lch(36.55, 73.80, 297.85°)
OKLab	oklab(46.67% 0.0029 -0.1884)
OKLCH	oklch(46.67% 0.188 270.9)
XYZ	xyz(13.5153, 9.2958, 51.5237)
Luminance	0.0930 (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

#3748C1 #C1B037

analogous

#378DC1 #3748C1 #6B37C1

triadic

#3748C1 #C13748 #48C137

tetradic

#3748C1 #C1378D #C1B037 #37C16B

square

#3748C1 #C1378D #C1B037 #37C16B

split-complementary

#3748C1 #C16B37 #8DC137

monochromatic

#1C2462 #293691 #3748C1 #6370D2 #929CE0

Accessibility & contrast

On white

7.34

#3748C1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.86

#3748C1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748C1

7.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748C1	#FFFFFF	#000000	##FFFFFF
##3748C1	1.00	7.34	2.86	7.34
#FFFFFF	7.34	1.00	21.00	1.00
#000000	2.86	21.00	1.00	21.00
##FFFFFF	7.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CC5

Deuteranopia (green-blind)

#0050BF

Tritanopia (blue-blind)

#00677E

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3748c1;
/* rgb */ color: rgb(55, 72, 193);
/* oklch */ color: oklch(46.7% 0.188 270.9);

Tailwind

colors: {
  custom: {
    50: '#817bd5',
    500: '#3748c1',
    950: '#000000',
  },
}

SCSS

$custom: #3748c1;
$custom-light: #817bd5;
$custom-dark: #000000;

JSON

{
  "hex": "#3748c1",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 193
  },
  "hsl": {
    "h": 232.609,
    "s": 55.645,
    "l": 48.627
  },
  "oklch": {
    "l": 0.46666,
    "c": 0.18847,
    "h": 270.9
  },
  "luminance": 0.09297
}

Semantic roles & 50–950 ramp

primary

#3748C1

secondary

#CBC389

accent

#CC49DF

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #3748C1

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

Preview Lab → · Contrast checker → · Palette generator →