#3837AB#3837AB

#3837AB is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.8% C 0.179 H 275.7°. Best body text is #FFFFFF at 9.12:1 contrast (WCAG AA passes).

Color values

HEX	#3837AB
RGB	rgb(56, 55, 171)
HSL	hsl(241, 51%, 44%)
HSV	hsv(241, 68%, 67%)
CMYK	cmyk(67.3%, 67.8%, 0%, 32.9%)
CIE-LAB	lab(30.67, 37.56, -61.85)
CIE-LCH	lch(30.67, 72.36, 301.27°)
OKLab	oklab(41.8% 0.0179 -0.1785)
OKLCH	oklch(41.8% 0.179 275.7)
XYZ	xyz(10.3453, 6.5125, 39.2320)
Luminance	0.0651 (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

#3837AB #AAAB37

analogous

#3770AB #3837AB #7237AB

triadic

#3837AB #AB3837 #37AB38

tetradic

#3837AB #AB3770 #AAAB37 #37AB72

square

#3837AB #AB3770 #AAAB37 #37AB72

split-complementary

#3837AB #AB7237 #70AB37

monochromatic

#1A194E #29287D #3837AB #5756C9 #8585D8

Accessibility & contrast

On white

9.12

#3837AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#3837AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3837AB

9.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3837AB	#FFFFFF	#000000	##FFFFFF
##3837AB	1.00	9.12	2.30	9.12
#FFFFFF	9.12	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DAF

Deuteranopia (green-blind)

#0043A9

Tritanopia (blue-blind)

#00566C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3837ab;
/* rgb */ color: rgb(56, 55, 171);
/* oklch */ color: oklch(41.8% 0.179 275.7);

Tailwind

colors: {
  custom: {
    50: '#7e6ec5',
    500: '#3837ab',
    950: '#000000',
  },
}

SCSS

$custom: #3837ab;
$custom-light: #7e6ec5;
$custom-dark: #000000;

JSON

{
  "hex": "#3837ab",
  "rgb": {
    "r": 56,
    "g": 55,
    "b": 171
  },
  "hsl": {
    "h": 240.517,
    "s": 51.327,
    "l": 44.314
  },
  "oklch": {
    "l": 0.41797,
    "c": 0.17944,
    "h": 275.7
  },
  "luminance": 0.06513
}

Semantic roles & 50–950 ramp

primary

#3837AB

secondary

#C1C17C

accent

#DB4DDA

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3837AB

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

Preview Lab → · Contrast checker → · Palette generator →