#3937B4#3937B4

#3937B4 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.7% C 0.191 H 275.4°. Best body text is #FFFFFF at 8.83:1 contrast (WCAG AA passes).

Color values

HEX	#3937B4
RGB	rgb(57, 55, 180)
HSL	hsl(241, 53%, 46%)
HSV	hsv(241, 69%, 71%)
CMYK	cmyk(68.3%, 69.4%, 0%, 29.4%)
CIE-LAB	lab(31.57, 40.73, -65.74)
CIE-LCH	lch(31.57, 77.34, 301.78°)
OKLab	oklab(42.72% 0.0179 -0.1899)
OKLCH	oklch(42.72% 0.191 275.4)
XYZ	xyz(11.2890, 6.8965, 43.9074)
Luminance	0.0690 (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

#3937B4 #B2B437

analogous

#3773B4 #3937B4 #7737B4

triadic

#3937B4 #B43937 #37B439

tetradic

#3937B4 #B43773 #B2B437 #37B477

square

#3937B4 #B43773 #B2B437 #37B477

split-complementary

#3937B4 #B47737 #73B437

monochromatic

#1B1A56 #2A2985 #3937B4 #5D5BCD #8B8ADB

Accessibility & contrast

On white

8.83

#3937B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#3937B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3937B4

8.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3937B4	#FFFFFF	#000000	##FFFFFF
##3937B4	1.00	8.83	2.38	8.83
#FFFFFF	8.83	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B8

Deuteranopia (green-blind)

#0045B2

Tritanopia (blue-blind)

#005971

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3937b4;
/* rgb */ color: rgb(57, 55, 180);
/* oklch */ color: oklch(42.7% 0.191 275.4);

Tailwind

colors: {
  custom: {
    50: '#806fcc',
    500: '#3937b4',
    950: '#000000',
  },
}

SCSS

$custom: #3937b4;
$custom-light: #806fcc;
$custom-dark: #000000;

JSON

{
  "hex": "#3937b4",
  "rgb": {
    "r": 57,
    "g": 55,
    "b": 180
  },
  "hsl": {
    "h": 240.96,
    "s": 53.191,
    "l": 46.078
  },
  "oklch": {
    "l": 0.42718,
    "c": 0.19075,
    "h": 275.4
  },
  "luminance": 0.06898
}

Semantic roles & 50–950 ramp

primary

#3937B4

secondary

#C4C681

accent

#DD4BDA

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #3937B4

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

Preview Lab → · Contrast checker → · Palette generator →