#3740BD#3740BD

#3740BD is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.9% C 0.193 H 272.6°. Best body text is #FFFFFF at 7.98:1 contrast (WCAG AA passes).

Color values

HEX	#3740BD
RGB	rgb(55, 64, 189)
HSL	hsl(236, 55%, 48%)
HSV	hsv(236, 71%, 74%)
CMYK	cmyk(70.9%, 66.1%, 0%, 25.9%)
CIE-LAB	lab(34.30, 38.09, -66.59)
CIE-LCH	lch(34.30, 76.71, 299.77°)
OKLab	oklab(44.91% 0.0086 -0.1924)
OKLCH	oklch(44.91% 0.193 272.6)
XYZ	xyz(12.5912, 8.1519, 49.0442)
Luminance	0.0815 (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

#3740BD #BDB437

analogous

#3783BD #3740BD #7137BD

triadic

#3740BD #BD3740 #40BD37

tetradic

#3740BD #BD3783 #BDB437 #37BD71

square

#3740BD #BD3783 #BDB437 #37BD71

split-complementary

#3740BD #BD7137 #83BD37

monochromatic

#1B205E #29308E #3740BD #6068D1 #9095DF

Accessibility & contrast

On white

7.98

#3740BD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#3740BD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3740BD

7.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3740BD	#FFFFFF	#000000	##FFFFFF
##3740BD	1.00	7.98	2.63	7.98
#FFFFFF	7.98	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	7.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057C1

Deuteranopia (green-blind)

#004ABB

Tritanopia (blue-blind)

#006179

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #3740bd;
/* rgb */ color: rgb(55, 64, 189);
/* oklch */ color: oklch(44.9% 0.193 272.6);

Tailwind

colors: {
  custom: {
    50: '#8075d2',
    500: '#3740bd',
    950: '#000000',
  },
}

SCSS

$custom: #3740bd;
$custom-light: #8075d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3740bd",
  "rgb": {
    "r": 55,
    "g": 64,
    "b": 189
  },
  "hsl": {
    "h": 235.97,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.44911,
    "c": 0.19262,
    "h": 272.6
  },
  "luminance": 0.08153
}

Semantic roles & 50–950 ramp

primary

#3740BD

secondary

#C9C586

accent

#D44ADE

background

#F8F7FD

surface

#F0EDFA

border

#CBC8D3

text

#0C0814

muted

#7D7B83

Preview Lab

Preview with #3740BD

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

Preview Lab → · Contrast checker → · Palette generator →