#3937B3#3937B3

#3937B3 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.6% C 0.189 H 275.5°. Best body text is #FFFFFF at 8.86:1 contrast (WCAG AA passes).

Color values

HEX	#3937B3
RGB	rgb(57, 55, 179)
HSL	hsl(241, 53%, 46%)
HSV	hsv(241, 69%, 70%)
CMYK	cmyk(68.2%, 69.3%, 0%, 29.8%)
CIE-LAB	lab(31.48, 40.40, -65.30)
CIE-LCH	lch(31.48, 76.79, 301.74°)
OKLab	oklab(42.62% 0.0181 -0.1886)
OKLCH	oklch(42.62% 0.189 275.5)
XYZ	xyz(11.1875, 6.8559, 43.3728)
Luminance	0.0686 (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

#3937B3 #B1B337

analogous

#3773B3 #3937B3 #7737B3

triadic

#3937B3 #B33937 #37B339

tetradic

#3937B3 #B33773 #B1B337 #37B377

square

#3937B3 #B33773 #B1B337 #37B377

split-complementary

#3937B3 #B37737 #73B337

monochromatic

#1B1A55 #2A2984 #3937B3 #5D5BCD #8B8ADB

Accessibility & contrast

On white

8.86

#3937B3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#3937B3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3937B3

8.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3937B3	#FFFFFF	#000000	##FFFFFF
##3937B3	1.00	8.86	2.37	8.86
#FFFFFF	8.86	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B7

Deuteranopia (green-blind)

#0044B1

Tritanopia (blue-blind)

#005971

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3937b3;
/* rgb */ color: rgb(57, 55, 179);
/* oklch */ color: oklch(42.6% 0.189 275.5);

Tailwind

colors: {
  custom: {
    50: '#806fcb',
    500: '#3937b3',
    950: '#000000',
  },
}

SCSS

$custom: #3937b3;
$custom-light: #806fcb;
$custom-dark: #000000;

JSON

{
  "hex": "#3937b3",
  "rgb": {
    "r": 57,
    "g": 55,
    "b": 179
  },
  "hsl": {
    "h": 240.968,
    "s": 52.991,
    "l": 45.882
  },
  "oklch": {
    "l": 0.42622,
    "c": 0.18948,
    "h": 275.5
  },
  "luminance": 0.06857
}

Semantic roles & 50–950 ramp

primary

#3937B3

secondary

#C4C581

accent

#DC4BDA

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0713

muted

#7D7A82

Preview Lab

Preview with #3937B3

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

Preview Lab → · Contrast checker → · Palette generator →