#3748B0#3748B0

#3748B0 is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.2% C 0.166 H 271.1°. Best body text is #FFFFFF at 7.73:1 contrast (WCAG AA passes).

Color values

HEX	#3748B0
RGB	rgb(55, 72, 176)
HSL	hsl(232, 52%, 45%)
HSV	hsv(232, 69%, 69%)
CMYK	cmyk(68.8%, 59.1%, 0%, 31%)
CIE-LAB	lab(35.16, 28.38, -57.50)
CIE-LCH	lch(35.16, 64.12, 296.27°)
OKLab	oklab(45.21% 0.0032 -0.1657)
OKLCH	oklch(45.21% 0.166 271.1)
XYZ	xyz(11.7267, 8.5804, 42.1041)
Luminance	0.0858 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3748B0 #B09F37

analogous

#3785B0 #3748B0 #6237B0

triadic

#3748B0 #B03748 #48B037

tetradic

#3748B0 #B03785 #B09F37 #37B062

square

#3748B0 #B03785 #B09F37 #37B062

split-complementary

#3748B0 #B06237 #85B037

monochromatic

#1A2253 #283581 #3748B0 #5969CB #8893DA

Accessibility & contrast

On white

7.73

#3748B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#3748B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748B0

7.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748B0	#FFFFFF	#000000	##FFFFFF
##3748B0	1.00	7.73	2.72	7.73
#FFFFFF	7.73	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058B3

Deuteranopia (green-blind)

#004DAE

Tritanopia (blue-blind)

#006275

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3748b0;
/* rgb */ color: rgb(55, 72, 176);
/* oklch */ color: oklch(45.2% 0.166 271.1);

Tailwind

colors: {
  custom: {
    50: '#7d7ac8',
    500: '#3748b0',
    950: '#000000',
  },
}

SCSS

$custom: #3748b0;
$custom-light: #7d7ac8;
$custom-dark: #000000;

JSON

{
  "hex": "#3748b0",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 176
  },
  "hsl": {
    "h": 231.57,
    "s": 52.381,
    "l": 45.294
  },
  "oklch": {
    "l": 0.45211,
    "c": 0.16571,
    "h": 271.1
  },
  "luminance": 0.08582
}

Semantic roles & 50–950 ramp

primary

#3748B0

secondary

#C4BA7F

accent

#C84CDC

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3748B0

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

Preview Lab → · Contrast checker → · Palette generator →