#3837BD#3837BD

#3837BD is a dark, highly saturated blue. Relative luminance 0.072; OKLCH L 43.5% C 0.202 H 274.4°. Best body text is #FFFFFF at 8.57:1 contrast (WCAG AA passes).

Color values

HEX	#3837BD
RGB	rgb(56, 55, 189)
HSL	hsl(240, 55%, 48%)
HSV	hsv(240, 71%, 74%)
CMYK	cmyk(70.4%, 70.9%, 0%, 25.9%)
CIE-LAB	lab(32.36, 43.62, -69.77)
CIE-LCH	lch(32.36, 82.29, 302.02°)
OKLab	oklab(43.53% 0.0154 -0.2017)
OKLCH	oklch(43.53% 0.202 274.4)
XYZ	xyz(12.1793, 7.2461, 48.8910)
Luminance	0.0725 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 3.78

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3837BD #BCBD37

analogous

#3779BD #3837BD #7B37BD

triadic

#3837BD #BD3837 #37BD38

tetradic

#3837BD #BD3779 #BCBD37 #37BD7B

square

#3837BD #BD3779 #BCBD37 #37BD7B

split-complementary

#3837BD #BD7B37 #79BD37

monochromatic

#1C1B5E #2A298E #3837BD #6160D1 #9090DF

Accessibility & contrast

On white

8.57

#3837BD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#3837BD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3837BD

8.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3837BD	#FFFFFF	#000000	##FFFFFF
##3837BD	1.00	8.57	2.45	8.57
#FFFFFF	8.57	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052C1

Deuteranopia (green-blind)

#0046BB

Tritanopia (blue-blind)

#005C76

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3837bd;
/* rgb */ color: rgb(56, 55, 189);
/* oklch */ color: oklch(43.5% 0.202 274.4);

Tailwind

colors: {
  custom: {
    50: '#826fd2',
    500: '#3837bd',
    950: '#000000',
  },
}

SCSS

$custom: #3837bd;
$custom-light: #826fd2;
$custom-dark: #000000;

JSON

{
  "hex": "#3837bd",
  "rgb": {
    "r": 56,
    "g": 55,
    "b": 189
  },
  "hsl": {
    "h": 240.448,
    "s": 54.918,
    "l": 47.843
  },
  "oklch": {
    "l": 0.43528,
    "c": 0.20229,
    "h": 274.4
  },
  "luminance": 0.07247
}

Semantic roles & 50–950 ramp

primary

#3837BD

secondary

#C9C986

accent

#DE4ADD

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3837BD

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

Preview Lab → · Contrast checker → · Palette generator →