#3748D8#3748D8

#3748D8 is a mid, highly saturated blue. Relative luminance 0.104; OKLCH L 48.8% C 0.218 H 270.4°. Best body text is #FFFFFF at 6.82:1 contrast (WCAG AA passes).

Color values

HEX	#3748D8
RGB	rgb(55, 72, 216)
HSL	hsl(234, 67%, 53%)
HSV	hsv(234, 75%, 85%)
CMYK	cmyk(74.5%, 66.7%, 0%, 15.3%)
CIE-LAB	lab(38.56, 42.54, -75.29)
CIE-LCH	lch(38.56, 86.47, 299.47°)
OKLab	oklab(48.75% 0.0015 -0.2178)
OKLCH	oklch(48.75% 0.218 270.4)
XYZ	xyz(16.2834, 10.4031, 66.1023)
Luminance	0.1041 (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

#3748D8 #D8C737

analogous

#3798D8 #3748D8 #7737D8

triadic

#3748D8 #D83748 #48D837

tetradic

#3748D8 #D83798 #D8C737 #37D877

square

#3748D8 #D83798 #D8C737 #37D877

split-complementary

#3748D8 #D87737 #98D837

monochromatic

#18237C #2231B0 #3748D8 #6A77E2 #9DA6EC

Accessibility & contrast

On white

6.82

#3748D8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.08

#3748D8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3748D8

6.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748D8	#FFFFFF	#000000	##FFFFFF
##3748D8	1.00	6.82	3.08	6.82
#FFFFFF	6.82	1.00	21.00	1.00
#000000	3.08	21.00	1.00	21.00
##FFFFFF	6.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0063DC

Deuteranopia (green-blind)

#0053D5

Tritanopia (blue-blind)

#006F8A

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3748d8;
/* rgb */ color: rgb(55, 72, 216);
/* oklch */ color: oklch(48.8% 0.218 270.4);

Tailwind

colors: {
  custom: {
    50: '#867be5',
    500: '#3748d8',
    950: '#000000',
  },
}

SCSS

$custom: #3748d8;
$custom-light: #867be5;
$custom-dark: #000000;

JSON

{
  "hex": "#3748d8",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 216
  },
  "hsl": {
    "h": 233.665,
    "s": 67.364,
    "l": 53.137
  },
  "oklch": {
    "l": 0.48752,
    "c": 0.21783,
    "h": 270.4
  },
  "luminance": 0.10405
}

Semantic roles & 50–950 ramp

primary

#3748D8

secondary

#D8D193

accent

#D83EEA

background

#F9F7FE

surface

#F1EEFC

border

#CBC9D5

text

#0D0916

muted

#7E7B84

Preview Lab

Preview with #3748D8

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

Preview Lab → · Contrast checker → · Palette generator →