#3837BC#3837BC

#3837BC is a dark, highly saturated blue. Relative luminance 0.072; OKLCH L 43.4% C 0.201 H 274.4°. Best body text is #FFFFFF at 8.60:1 contrast (WCAG AA passes).

Color values

HEX	#3837BC
RGB	rgb(56, 55, 188)
HSL	hsl(240, 55%, 48%)
HSV	hsv(240, 71%, 74%)
CMYK	cmyk(70.2%, 70.7%, 0%, 26.3%)
CIE-LAB	lab(32.26, 43.29, -69.34)
CIE-LCH	lch(32.26, 81.74, 301.98°)
OKLab	oklab(43.43% 0.0155 -0.2004)
OKLCH	oklch(43.43% 0.201 274.4)
XYZ	xyz(12.0712, 7.2028, 48.3213)
Luminance	0.0720 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 3.68

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3837BC #BBBC37

analogous

#3779BC #3837BC #7A37BC

triadic

#3837BC #BC3837 #37BC38

tetradic

#3837BC #BC3779 #BBBC37 #37BC7A

square

#3837BC #BC3779 #BBBC37 #37BC7A

split-complementary

#3837BC #BC7A37 #79BC37

monochromatic

#1C1B5D #2A298D #3837BC #6160D0 #908FDE

Accessibility & contrast

On white

8.60

#3837BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#3837BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3837BC

8.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3837BC	#FFFFFF	#000000	##FFFFFF
##3837BC	1.00	8.60	2.44	8.60
#FFFFFF	8.60	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052C0

Deuteranopia (green-blind)

#0046BA

Tritanopia (blue-blind)

#005C75

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3837bc;
/* rgb */ color: rgb(56, 55, 188);
/* oklch */ color: oklch(43.4% 0.201 274.4);

Tailwind

colors: {
  custom: {
    50: '#816fd1',
    500: '#3837bc',
    950: '#000000',
  },
}

SCSS

$custom: #3837bc;
$custom-light: #816fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3837bc",
  "rgb": {
    "r": 56,
    "g": 55,
    "b": 188
  },
  "hsl": {
    "h": 240.451,
    "s": 54.733,
    "l": 47.647
  },
  "oklch": {
    "l": 0.4343,
    "c": 0.20105,
    "h": 274.4
  },
  "luminance": 0.07204
}

Semantic roles & 50–950 ramp

primary

#3837BC

secondary

#C8C986

accent

#DE4ADD

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3837BC

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

Preview Lab → · Contrast checker → · Palette generator →