#3940B7#3940B7

#3940B7 is a dark, vivid blue. Relative luminance 0.080; OKLCH L 44.5% C 0.184 H 273.5°. Best body text is #FFFFFF at 8.10:1 contrast (WCAG AA passes).

Color values

HEX	#3940B7
RGB	rgb(57, 64, 183)
HSL	hsl(237, 53%, 47%)
HSV	hsv(237, 69%, 72%)
CMYK	cmyk(68.9%, 65%, 0%, 28.2%)
CIE-LAB	lab(33.89, 36.25, -63.72)
CIE-LCH	lch(33.89, 73.31, 299.64°)
OKLab	oklab(44.48% 0.0113 -0.184)
OKLCH	oklch(44.48% 0.184 273.5)
XYZ	xyz(12.0651, 7.9544, 45.6901)
Luminance	0.0796 (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

#3940B7 #B7B039

analogous

#397FB7 #3940B7 #7139B7

triadic

#3940B7 #B73940 #40B739

tetradic

#3940B7 #B7397F #B7B039 #39B771

square

#3940B7 #B7397F #B7B039 #39B771

split-complementary

#3940B7 #B77139 #7FB739

monochromatic

#1C1F5A #2A3088 #3940B7 #6066CD #8E93DC

Accessibility & contrast

On white

8.10

#3940B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#3940B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3940B7

8.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3940B7	#FFFFFF	#000000	##FFFFFF
##3940B7	1.00	8.10	2.59	8.10
#FFFFFF	8.10	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056BB

Deuteranopia (green-blind)

#004AB5

Tritanopia (blue-blind)

#005F76

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #3940b7;
/* rgb */ color: rgb(57, 64, 183);
/* oklch */ color: oklch(44.5% 0.184 273.5);

Tailwind

colors: {
  custom: {
    50: '#8075ce',
    500: '#3940b7',
    950: '#000000',
  },
}

SCSS

$custom: #3940b7;
$custom-light: #8075ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3940b7",
  "rgb": {
    "r": 57,
    "g": 64,
    "b": 183
  },
  "hsl": {
    "h": 236.667,
    "s": 52.5,
    "l": 47.059
  },
  "oklch": {
    "l": 0.44482,
    "c": 0.18432,
    "h": 273.5
  },
  "luminance": 0.07956
}

Semantic roles & 50–950 ramp

primary

#3940B7

secondary

#C7C385

accent

#D44CDC

background

#F8F7FC

surface

#F0EDF9

border

#CBC8D2

text

#0C0814

muted

#7D7B82

Preview Lab

Preview with #3940B7

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

Preview Lab → · Contrast checker → · Palette generator →