#3937AB#3937AB

#3937AB is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.9% C 0.179 H 276.1°. Best body text is #FFFFFF at 9.10:1 contrast (WCAG AA passes).

Color values

HEX	#3937AB
RGB	rgb(57, 55, 171)
HSL	hsl(241, 51%, 44%)
HSV	hsv(241, 68%, 67%)
CMYK	cmyk(66.7%, 67.8%, 0%, 32.9%)
CIE-LAB	lab(30.74, 37.70, -61.73)
CIE-LCH	lch(30.74, 72.33, 301.41°)
OKLab	oklab(41.87% 0.0191 -0.1782)
OKLCH	oklch(41.87% 0.179 276.1)
XYZ	xyz(10.4018, 6.5416, 39.2347)
Luminance	0.0654 (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

#3937AB #A9AB37

analogous

#376FAB #3937AB #7337AB

triadic

#3937AB #AB3937 #37AB39

tetradic

#3937AB #AB376F #A9AB37 #37AB73

square

#3937AB #AB376F #A9AB37 #37AB73

split-complementary

#3937AB #AB7337 #6FAB37

monochromatic

#1A194E #2A287D #3937AB #5856C9 #8685D8

Accessibility & contrast

On white

9.10

#3937AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.31

#3937AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3937AB

9.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3937AB	#FFFFFF	#000000	##FFFFFF
##3937AB	1.00	9.10	2.31	9.10
#FFFFFF	9.10	1.00	21.00	1.00
#000000	2.31	21.00	1.00	21.00
##FFFFFF	9.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DAF

Deuteranopia (green-blind)

#0043A9

Tritanopia (blue-blind)

#00566C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #3937ab;
/* rgb */ color: rgb(57, 55, 171);
/* oklch */ color: oklch(41.9% 0.179 276.1);

Tailwind

colors: {
  custom: {
    50: '#7e6ec5',
    500: '#3937ab',
    950: '#000000',
  },
}

SCSS

$custom: #3937ab;
$custom-light: #7e6ec5;
$custom-dark: #000000;

JSON

{
  "hex": "#3937ab",
  "rgb": {
    "r": 57,
    "g": 55,
    "b": 171
  },
  "hsl": {
    "h": 241.034,
    "s": 51.327,
    "l": 44.314
  },
  "oklch": {
    "l": 0.41865,
    "c": 0.17921,
    "h": 276.1
  },
  "luminance": 0.06543
}

Semantic roles & 50–950 ramp

primary

#3937AB

secondary

#C0C17C

accent

#DB4DD8

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3937AB

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

Preview Lab → · Contrast checker → · Palette generator →