#3748CA#3748CA

#3748CA is a mid, highly saturated blue. Relative luminance 0.097; OKLCH L 47.5% C 0.200 H 270.7°. Best body text is #FFFFFF at 7.14:1 contrast (WCAG AA passes).

Color values

HEX	#3748CA
RGB	rgb(55, 72, 202)
HSL	hsl(233, 58%, 50%)
HSV	hsv(233, 73%, 79%)
CMYK	cmyk(72.8%, 64.4%, 0%, 20.8%)
CIE-LAB	lab(37.32, 37.66, -69.24)
CIE-LCH	lch(37.32, 78.82, 298.54°)
OKLab	oklab(47.47% 0.0025 -0.2001)
OKLCH	oklch(47.47% 0.2 270.7)
XYZ	xyz(14.5500, 9.7097, 56.9730)
Luminance	0.0971 (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

#3748CA #CAB937

analogous

#3792CA #3748CA #6F37CA

triadic

#3748CA #CA3748 #48CA37

tetradic

#3748CA #CA3792 #CAB937 #37CA6F

square

#3748CA #CA3792 #CAB937 #37CA6F

split-complementary

#3748CA #CA6F37 #92CA37

monochromatic

#1C256A #29369B #3748CA #6774D7 #98A1E4

Accessibility & contrast

On white

7.14

#3748CA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.94

#3748CA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3748CA

7.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3748CA	#FFFFFF	#000000	##FFFFFF
##3748CA	1.00	7.14	2.94	7.14
#FFFFFF	7.14	1.00	21.00	1.00
#000000	2.94	21.00	1.00	21.00
##FFFFFF	7.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005FCE

Deuteranopia (green-blind)

#0051C8

Tritanopia (blue-blind)

#006A82

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #3748ca;
/* rgb */ color: rgb(55, 72, 202);
/* oklch */ color: oklch(47.5% 0.200 270.7);

Tailwind

colors: {
  custom: {
    50: '#837bdb',
    500: '#3748ca',
    950: '#000000',
  },
}

SCSS

$custom: #3748ca;
$custom-light: #837bdb;
$custom-dark: #000000;

JSON

{
  "hex": "#3748ca",
  "rgb": {
    "r": 55,
    "g": 72,
    "b": 202
  },
  "hsl": {
    "h": 233.061,
    "s": 58.103,
    "l": 50.392
  },
  "oklch": {
    "l": 0.47468,
    "c": 0.20015,
    "h": 270.7
  },
  "luminance": 0.09711
}

Semantic roles & 50–950 ramp

primary

#3748CA

secondary

#CFC88E

accent

#CF46E1

background

#F8F7FD

surface

#F0EDFB

border

#CBC8D4

text

#0C0915

muted

#7D7B83

Preview Lab

Preview with #3748CA

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

Preview Lab → · Contrast checker → · Palette generator →