#3831BB#3831BB

#3831BB is a dark, highly saturated blue. Relative luminance 0.066; OKLCH L 42.5% C 0.206 H 275.3°. Best body text is #FFFFFF at 9.03:1 contrast (WCAG AA passes).

Color values

HEX	#3831BB
RGB	rgb(56, 49, 187)
HSL	hsl(243, 58%, 46%)
HSV	hsv(243, 74%, 73%)
CMYK	cmyk(70.1%, 73.8%, 0%, 26.7%)
CIE-LAB	lab(30.94, 46.39, -70.94)
CIE-LCH	lch(30.94, 84.76, 303.18°)
OKLab	oklab(42.45% 0.0191 -0.2051)
OKLCH	oklch(42.45% 0.206 275.3)
XYZ	xyz(11.6959, 6.6241, 47.6663)
Luminance	0.0663 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 4.24

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3831BB #B4BB31

analogous

#316FBB #3831BB #7D31BB

triadic

#3831BB #BB3831 #31BB38

tetradic

#3831BB #BB316F #B4BB31 #31BB7D

square

#3831BB #BB316F #B4BB31 #31BB7D

split-complementary

#3831BB #BB7D31 #6FBB31

monochromatic

#1B185A #29248B #3831BB #5D56D3 #8B87E0

Accessibility & contrast

On white

9.03

#3831BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#3831BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3831BB

9.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3831BB	#FFFFFF	#000000	##FFFFFF
##3831BB	1.00	9.03	2.33	9.03
#FFFFFF	9.03	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FBF

Deuteranopia (green-blind)

#0042B9

Tritanopia (blue-blind)

#005973

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3831bb;
/* rgb */ color: rgb(56, 49, 187);
/* oklch */ color: oklch(42.5% 0.206 275.3);

Tailwind

colors: {
  custom: {
    50: '#826bd1',
    500: '#3831bb',
    950: '#000000',
  },
}

SCSS

$custom: #3831bb;
$custom-light: #826bd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3831bb",
  "rgb": {
    "r": 56,
    "g": 49,
    "b": 187
  },
  "hsl": {
    "h": 243.043,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.42453,
    "c": 0.20597,
    "h": 275.3
  },
  "luminance": 0.06625
}

Semantic roles & 50–950 ramp

primary

#3831BB

secondary

#C5C97F

accent

#E246DA

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3831BB

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

Preview Lab → · Contrast checker → · Palette generator →