#3940B1#3940B1

#3940B1 is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.9% C 0.176 H 273.8°. Best body text is #FFFFFF at 8.26:1 contrast (WCAG AA passes).

Color values

HEX	#3940B1
RGB	rgb(57, 64, 177)
HSL	hsl(237, 51%, 46%)
HSV	hsv(237, 68%, 69%)
CMYK	cmyk(67.8%, 63.8%, 0%, 30.6%)
CIE-LAB	lab(33.37, 34.16, -61.01)
CIE-LCH	lch(33.37, 69.92, 299.25°)
OKLab	oklab(43.94% 0.0118 -0.176)
OKLCH	oklch(43.94% 0.176 273.8)
XYZ	xyz(11.4539, 7.7099, 42.4710)
Luminance	0.0771 (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

#3940B1 #B1AA39

analogous

#397CB1 #3940B1 #6E39B1

triadic

#3940B1 #B13940 #40B139

tetradic

#3940B1 #B1397C #B1AA39 #39B16E

square

#3940B1 #B1397C #B1AA39 #39B16E

split-complementary

#3940B1 #B16E39 #7CB139

monochromatic

#1B1F54 #2A2F83 #3940B1 #5D63CB #8B8FDA

Accessibility & contrast

On white

8.26

#3940B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#3940B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3940B1

8.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3940B1	#FFFFFF	#000000	##FFFFFF
##3940B1	1.00	8.26	2.54	8.26
#FFFFFF	8.26	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B5

Deuteranopia (green-blind)

#0049AF

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #3940b1;
/* rgb */ color: rgb(57, 64, 177);
/* oklch */ color: oklch(43.9% 0.176 273.8);

Tailwind

colors: {
  custom: {
    50: '#7f75c9',
    500: '#3940b1',
    950: '#000000',
  },
}

SCSS

$custom: #3940b1;
$custom-light: #7f75c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3940b1",
  "rgb": {
    "r": 57,
    "g": 64,
    "b": 177
  },
  "hsl": {
    "h": 236.5,
    "s": 51.282,
    "l": 45.882
  },
  "oklch": {
    "l": 0.43944,
    "c": 0.17641,
    "h": 273.8
  },
  "luminance": 0.07711
}

Semantic roles & 50–950 ramp

primary

#3940B1

secondary

#C4C082

accent

#D24DDB

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3940B1

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

Preview Lab → · Contrast checker → · Palette generator →