#3940B3#3940B3

#3940B3 is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.1% C 0.179 H 273.7°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#3940B3
RGB	rgb(57, 64, 179)
HSL	hsl(237, 52%, 46%)
HSV	hsv(237, 68%, 70%)
CMYK	cmyk(68.2%, 64.2%, 0%, 29.8%)
CIE-LAB	lab(33.54, 34.86, -61.92)
CIE-LCH	lch(33.54, 71.06, 299.38°)
OKLab	oklab(44.12% 0.0116 -0.1787)
OKLCH	oklch(44.12% 0.179 273.7)
XYZ	xyz(11.6547, 7.7902, 43.5286)
Luminance	0.0779 (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

#3940B3 #B3AC39

analogous

#397DB3 #3940B3 #6F39B3

triadic

#3940B3 #B33940 #40B339

tetradic

#3940B3 #B3397D #B3AC39 #39B36F

square

#3940B3 #B3397D #B3AC39 #39B36F

split-complementary

#3940B3 #B36F39 #7DB339

monochromatic

#1B1F56 #2A2F85 #3940B3 #5E64CC #8C91DA

Accessibility & contrast

On white

8.21

#3940B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#3940B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3940B3

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3940B3	#FFFFFF	#000000	##FFFFFF
##3940B3	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0054B7

Deuteranopia (green-blind)

#0049B1

Tritanopia (blue-blind)

#005E73

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #3940b3;
/* rgb */ color: rgb(57, 64, 179);
/* oklch */ color: oklch(44.1% 0.179 273.7);

Tailwind

colors: {
  custom: {
    50: '#7f75cb',
    500: '#3940b3',
    950: '#000000',
  },
}

SCSS

$custom: #3940b3;
$custom-light: #7f75cb;
$custom-dark: #000000;

JSON

{
  "hex": "#3940b3",
  "rgb": {
    "r": 57,
    "g": 64,
    "b": 179
  },
  "hsl": {
    "h": 236.557,
    "s": 51.695,
    "l": 46.275
  },
  "oklch": {
    "l": 0.44122,
    "c": 0.17906,
    "h": 273.7
  },
  "luminance": 0.07791
}

Semantic roles & 50–950 ramp

primary

#3940B3

secondary

#C5C183

accent

#D34DDB

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0B0813

muted

#7C7B82

Preview Lab

Preview with #3940B3

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

Preview Lab → · Contrast checker → · Palette generator →