#3747B4#3747B4

#3747B4 is a mid, vivid blue. Relative luminance 0.086; OKLCH L 45.4% C 0.172 H 271.3°. Best body text is #FFFFFF at 7.71:1 contrast (WCAG AA passes).

Color values

HEX	#3747B4
RGB	rgb(55, 71, 180)
HSL	hsl(232, 53%, 46%)
HSV	hsv(232, 69%, 71%)
CMYK	cmyk(69.4%, 60.6%, 0%, 29.4%)
CIE-LAB	lab(35.23, 30.47, -59.76)
CIE-LCH	lch(35.23, 67.08, 297.02°)
OKLab	oklab(45.36% 0.004 -0.1723)
OKLCH	oklch(45.36% 0.172 271.3)
XYZ	xyz(12.0642, 8.6128, 44.1978)
Luminance	0.0861 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3747B4 #B4A437

analogous

#3785B4 #3747B4 #6537B4

triadic

#3747B4 #B43747 #47B437

tetradic

#3747B4 #B43785 #B4A437 #37B465

square

#3747B4 #B43785 #B4A437 #37B465

split-complementary

#3747B4 #B46537 #85B437

monochromatic

#1A2256 #293585 #3747B4 #5B6ACD #8A95DB

Accessibility & contrast

On white

7.71

#3747B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.72

#3747B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3747B4

7.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3747B4	#FFFFFF	#000000	##FFFFFF
##3747B4	1.00	7.71	2.72	7.71
#FFFFFF	7.71	1.00	21.00	1.00
#000000	2.72	21.00	1.00	21.00
##FFFFFF	7.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059B8

Deuteranopia (green-blind)

#004DB2

Tritanopia (blue-blind)

#006276

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #3747b4;
/* rgb */ color: rgb(55, 71, 180);
/* oklch */ color: oklch(45.4% 0.172 271.3);

Tailwind

colors: {
  custom: {
    50: '#7e7acb',
    500: '#3747b4',
    950: '#000000',
  },
}

SCSS

$custom: #3747b4;
$custom-light: #7e7acb;
$custom-dark: #000000;

JSON

{
  "hex": "#3747b4",
  "rgb": {
    "r": 55,
    "g": 71,
    "b": 180
  },
  "hsl": {
    "h": 232.32,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.45358,
    "c": 0.1724,
    "h": 271.3
  },
  "luminance": 0.08614
}

Semantic roles & 50–950 ramp

primary

#3747B4

secondary

#C6BD81

accent

#CA4BDD

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0913

muted

#7C7B82

Preview Lab

Preview with #3747B4

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

Preview Lab → · Contrast checker → · Palette generator →