#3748C0#3748C0

#3748C0 is a mid, vivid blue. Relative luminance 0.093; OKLCH L 46.6% C 0.187 H 270.9°. Best body text is #FFFFFF at 7.37:1 contrast (WCAG AA passes).

Color values

HEX	#3748C0
RGB	rgb(55, 72, 192)
HSL	hsl(233, 55%, 48%)
HSV	hsv(233, 71%, 75%)
CMYK	cmyk(71.4%, 62.5%, 0%, 24.7%)
CIE-LAB	lab(36.46, 34.12, -64.80)
CIE-LCH	lch(36.46, 73.24, 297.77°)
OKLab	oklab(46.58% 0.003 -0.1871)
OKLCH	oklch(46.58% 0.187 270.9)
XYZ	xyz(13.4041, 9.2514, 50.9382)
Luminance	0.0925 (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

#3748C0 #C0AF37

analogous

#378CC0 #3748C0 #6A37C0

triadic

#3748C0 #C03748 #48C037

tetradic

#3748C0 #C0378C #C0AF37 #37C06A

square

#3748C0 #C0378C #C0AF37 #37C06A

split-complementary

#3748C0 #C06A37 #8CC037

monochromatic

#1C2461 #293690 #3748C0 #6270D2 #929BE0

Accessibility & contrast

On white

7.37

#3748C0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.85

#3748C0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748C0

7.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748C0	#FFFFFF	#000000	##FFFFFF
##3748C0	1.00	7.37	2.85	7.37
#FFFFFF	7.37	1.00	21.00	1.00
#000000	2.85	21.00	1.00	21.00
##FFFFFF	7.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005CC4

Deuteranopia (green-blind)

#0050BE

Tritanopia (blue-blind)

#00677D

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #3748c0;
/* rgb */ color: rgb(55, 72, 192);
/* oklch */ color: oklch(46.6% 0.187 270.9);

Tailwind

colors: {
  custom: {
    50: '#807bd4',
    500: '#3748c0',
    950: '#000000',
  },
}

SCSS

$custom: #3748c0;
$custom-light: #807bd4;
$custom-dark: #000000;

JSON

{
  "hex": "#3748c0",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 192
  },
  "hsl": {
    "h": 232.555,
    "s": 55.466,
    "l": 48.431
  },
  "oklch": {
    "l": 0.46578,
    "c": 0.18716,
    "h": 270.9
  },
  "luminance": 0.09253
}

Semantic roles & 50–950 ramp

primary

#3748C0

secondary

#CBC288

accent

#CC49DF

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0914

muted

#7D7B83

Preview Lab

Preview with #3748C0

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

Preview Lab → · Contrast checker → · Palette generator →