#3940BB#3940BB

#3940BB is a dark, vivid blue. Relative luminance 0.081; OKLCH L 44.8% C 0.190 H 273.3°. Best body text is #FFFFFF at 8.00:1 contrast (WCAG AA passes).

Color values

HEX	#3940BB
RGB	rgb(57, 64, 187)
HSL	hsl(237, 53%, 48%)
HSV	hsv(237, 70%, 73%)
CMYK	cmyk(69.5%, 65.8%, 0%, 26.7%)
CIE-LAB	lab(34.24, 37.64, -65.51)
CIE-LCH	lch(34.24, 75.55, 299.88°)
OKLab	oklab(44.85% 0.011 -0.1892)
OKLCH	oklch(44.85% 0.19 273.3)
XYZ	xyz(12.4874, 8.1233, 47.9139)
Luminance	0.0813 (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

#3940BB #BBB439

analogous

#3981BB #3940BB #7339BB

triadic

#3940BB #BB3940 #40BB39

tetradic

#3940BB #BB3981 #BBB439 #39BB73

square

#3940BB #BB3981 #BBB439 #39BB73

split-complementary

#3940BB #BB7339 #81BB39

monochromatic

#1C205D #2B308C #3940BB #6268CF #9195DD

Accessibility & contrast

On white

8.00

#3940BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.63

#3940BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3940BB

8.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3940BB	#FFFFFF	#000000	##FFFFFF
##3940BB	1.00	8.00	2.63	8.00
#FFFFFF	8.00	1.00	21.00	1.00
#000000	2.63	21.00	1.00	21.00
##FFFFFF	8.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0057BF

Deuteranopia (green-blind)

#004BB9

Tritanopia (blue-blind)

#006078

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3940bb;
/* rgb */ color: rgb(57, 64, 187);
/* oklch */ color: oklch(44.8% 0.190 273.3);

Tailwind

colors: {
  custom: {
    50: '#8175d0',
    500: '#3940bb',
    950: '#000000',
  },
}

SCSS

$custom: #3940bb;
$custom-light: #8175d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3940bb",
  "rgb": {
    "r": 57,
    "g": 64,
    "b": 187
  },
  "hsl": {
    "h": 236.769,
    "s": 53.279,
    "l": 47.843
  },
  "oklch": {
    "l": 0.44845,
    "c": 0.18952,
    "h": 273.3
  },
  "luminance": 0.08125
}

Semantic roles & 50–950 ramp

primary

#3940BB

secondary

#C8C587

accent

#D54BDD

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3940BB

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

Preview Lab → · Contrast checker → · Palette generator →