#3747BA#3747BA

#3747BA is a mid, vivid blue. Relative luminance 0.089; OKLCH L 45.9% C 0.180 H 271.2°. Best body text is #FFFFFF at 7.57:1 contrast (WCAG AA passes).

Color values

HEX	#3747BA
RGB	rgb(55, 71, 186)
HSL	hsl(233, 54%, 47%)
HSV	hsv(233, 70%, 73%)
CMYK	cmyk(70.4%, 61.8%, 0%, 27.1%)
CIE-LAB	lab(35.72, 32.62, -62.50)
CIE-LCH	lch(35.72, 70.50, 297.56°)
OKLab	oklab(45.87% 0.0039 -0.1804)
OKLCH	oklch(45.87% 0.18 271.2)
XYZ	xyz(12.6887, 8.8626, 47.4868)
Luminance	0.0886 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 5.71

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3747BA #BAAA37

analogous

#3788BA #3747BA #6937BA

triadic

#3747BA #BA3747 #47BA37

tetradic

#3747BA #BA3788 #BAAA37 #37BA69

square

#3747BA #BA3788 #BAAA37 #37BA69

split-complementary

#3747BA #BA6937 #88BA37

monochromatic

#1B235C #29358B #3747BA #5F6CD0 #8E98DE

Accessibility & contrast

On white

7.57

#3747BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.77

#3747BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3747BA

7.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3747BA	#FFFFFF	#000000	##FFFFFF
##3747BA	1.00	7.57	2.77	7.57
#FFFFFF	7.57	1.00	21.00	1.00
#000000	2.77	21.00	1.00	21.00
##FFFFFF	7.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005ABE

Deuteranopia (green-blind)

#004EB8

Tritanopia (blue-blind)

#00647A

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #3747ba;
/* rgb */ color: rgb(55, 71, 186);
/* oklch */ color: oklch(45.9% 0.180 271.2);

Tailwind

colors: {
  custom: {
    50: '#7f7ad0',
    500: '#3747ba',
    950: '#000000',
  },
}

SCSS

$custom: #3747ba;
$custom-light: #7f7ad0;
$custom-dark: #000000;

JSON

{
  "hex": "#3747ba",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 186
  },
  "hsl": {
    "h": 232.672,
    "s": 54.357,
    "l": 47.255
  },
  "oklch": {
    "l": 0.45874,
    "c": 0.18043,
    "h": 271.2
  },
  "luminance": 0.08864
}

Semantic roles & 50–950 ramp

primary

#3747BA

secondary

#C8C085

accent

#CC4ADE

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0B0914

muted

#7C7B82

Preview Lab

Preview with #3747BA

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

Preview Lab → · Contrast checker → · Palette generator →