#3937B9#3937B9

#3937B9 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 43.2% C 0.197 H 275.0°. Best body text is #FFFFFF at 8.67:1 contrast (WCAG AA passes).

Color values

HEX	#3937B9
RGB	rgb(57, 55, 185)
HSL	hsl(241, 54%, 47%)
HSV	hsv(241, 70%, 73%)
CMYK	cmyk(69.2%, 70.3%, 0%, 27.5%)
CIE-LAB	lab(32.04, 42.41, -67.93)
CIE-LCH	lch(32.04, 80.08, 301.97°)
OKLab	oklab(43.2% 0.0172 -0.1963)
OKLCH	oklch(43.2% 0.197 275)
XYZ	xyz(11.8076, 7.1039, 46.6385)
Luminance	0.0711 (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

#3937B9 #B7B937

analogous

#3776B9 #3937B9 #7A37B9

triadic

#3937B9 #B93937 #37B939

tetradic

#3937B9 #B93776 #B7B937 #37B97A

square

#3937B9 #B93776 #B7B937 #37B97A

split-complementary

#3937B9 #B97A37 #76B937

monochromatic

#1C1B5B #2A298A #3937B9 #605ECF #8E8DDD

Accessibility & contrast

On white

8.67

#3937B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#3937B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3937B9

8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3937B9	#FFFFFF	#000000	##FFFFFF
##3937B9	1.00	8.67	2.42	8.67
#FFFFFF	8.67	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BD

Deuteranopia (green-blind)

#0045B7

Tritanopia (blue-blind)

#005B74

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3937b9;
/* rgb */ color: rgb(57, 55, 185);
/* oklch */ color: oklch(43.2% 0.197 275.0);

Tailwind

colors: {
  custom: {
    50: '#816fcf',
    500: '#3937b9',
    950: '#000000',
  },
}

SCSS

$custom: #3937b9;
$custom-light: #816fcf;
$custom-dark: #000000;

JSON

{
  "hex": "#3937b9",
  "rgb": {
    "r": 57,
    "g": 55,
    "b": 185
  },
  "hsl": {
    "h": 240.923,
    "s": 54.167,
    "l": 47.059
  },
  "oklch": {
    "l": 0.43201,
    "c": 0.19706,
    "h": 275
  },
  "luminance": 0.07105
}

Semantic roles & 50–950 ramp

primary

#3937B9

secondary

#C7C884

accent

#DE4ADB

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3937B9

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

Preview Lab → · Contrast checker → · Palette generator →