#3931BB#3931BB

#3931BB is a dark, highly saturated blue. Relative luminance 0.067; OKLCH L 42.5% C 0.206 H 275.7°. Best body text is #FFFFFF at 9.01:1 contrast (WCAG AA passes).

Color values

HEX	#3931BB
RGB	rgb(57, 49, 187)
HSL	hsl(243, 58%, 46%)
HSV	hsv(243, 74%, 73%)
CMYK	cmyk(69.5%, 73.8%, 0%, 26.7%)
CIE-LAB	lab(31.00, 46.49, -70.82)
CIE-LCH	lch(31.00, 84.72, 303.28°)
OKLab	oklab(42.52% 0.0204 -0.2047)
OKLCH	oklch(42.52% 0.206 275.7)
XYZ	xyz(11.7523, 6.6532, 47.6689)
Luminance	0.0665 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Sapphire (survey)

#2138AB

ΔE00 4.32

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3931BB #B3BB31

analogous

#316EBB #3931BB #7E31BB

triadic

#3931BB #BB3931 #31BB39

tetradic

#3931BB #BB316E #B3BB31 #31BB7E

square

#3931BB #BB316E #B3BB31 #31BB7E

split-complementary

#3931BB #BB7E31 #6EBB31

monochromatic

#1B185A #2A248B #3931BB #5E56D3 #8C87E0

Accessibility & contrast

On white

9.01

#3931BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#3931BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3931BB

9.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3931BB	#FFFFFF	#000000	##FFFFFF
##3931BB	1.00	9.01	2.33	9.01
#FFFFFF	9.01	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FBF

Deuteranopia (green-blind)

#0043B9

Tritanopia (blue-blind)

#005873

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #3931bb;
/* rgb */ color: rgb(57, 49, 187);
/* oklch */ color: oklch(42.5% 0.206 275.7);

Tailwind

colors: {
  custom: {
    50: '#826bd1',
    500: '#3931bb',
    950: '#000000',
  },
}

SCSS

$custom: #3931bb;
$custom-light: #826bd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3931bb",
  "rgb": {
    "r": 57,
    "g": 49,
    "b": 187
  },
  "hsl": {
    "h": 243.478,
    "s": 58.475,
    "l": 46.275
  },
  "oklch": {
    "l": 0.42519,
    "c": 0.20573,
    "h": 275.7
  },
  "luminance": 0.06654
}

Semantic roles & 50–950 ramp

primary

#3931BB

secondary

#C5C97F

accent

#E246D9

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3931BB

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

Preview Lab → · Contrast checker → · Palette generator →