#3837BA#3837BA

#3837BA is a dark, vivid blue. Relative luminance 0.071; OKLCH L 43.2% C 0.199 H 274.6°. Best body text is #FFFFFF at 8.66:1 contrast (WCAG AA passes).

Color values

HEX	#3837BA
RGB	rgb(56, 55, 186)
HSL	hsl(240, 54%, 47%)
HSV	hsv(240, 70%, 73%)
CMYK	cmyk(69.9%, 70.4%, 0%, 27.1%)
CIE-LAB	lab(32.07, 42.63, -68.47)
CIE-LCH	lch(32.07, 80.66, 301.90°)
OKLab	oklab(43.23% 0.0158 -0.1979)
OKLCH	oklch(43.23% 0.199 274.6)
XYZ	xyz(11.8571, 7.1172, 47.1937)
Luminance	0.0712 (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

#3837BA #B9BA37

analogous

#3778BA #3837BA #7A37BA

triadic

#3837BA #BA3837 #37BA38

tetradic

#3837BA #BA3778 #B9BA37 #37BA7A

square

#3837BA #BA3778 #B9BA37 #37BA7A

split-complementary

#3837BA #BA7A37 #78BA37

monochromatic

#1C1B5C #2A298B #3837BA #5F5FD0 #8E8EDE

Accessibility & contrast

On white

8.66

#3837BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#3837BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3837BA

8.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3837BA	#FFFFFF	#000000	##FFFFFF
##3837BA	1.00	8.66	2.42	8.66
#FFFFFF	8.66	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BE

Deuteranopia (green-blind)

#0045B8

Tritanopia (blue-blind)

#005B74

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3837ba;
/* rgb */ color: rgb(56, 55, 186);
/* oklch */ color: oklch(43.2% 0.199 274.6);

Tailwind

colors: {
  custom: {
    50: '#816fd0',
    500: '#3837ba',
    950: '#000000',
  },
}

SCSS

$custom: #3837ba;
$custom-light: #816fd0;
$custom-dark: #000000;

JSON

{
  "hex": "#3837ba",
  "rgb": {
    "r": 56,
    "g": 55,
    "b": 186
  },
  "hsl": {
    "h": 240.458,
    "s": 54.357,
    "l": 47.255
  },
  "oklch": {
    "l": 0.43234,
    "c": 0.19855,
    "h": 274.6
  },
  "luminance": 0.07118
}

Semantic roles & 50–950 ramp

primary

#3837BA

secondary

#C8C885

accent

#DE4ADD

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3837BA

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

Preview Lab → · Contrast checker → · Palette generator →