#3937BB#3937BB

#3937BB is a dark, vivid blue. Relative luminance 0.072; OKLCH L 43.4% C 0.200 H 274.9°. Best body text is #FFFFFF at 8.61:1 contrast (WCAG AA passes).

Color values

HEX	#3937BB
RGB	rgb(57, 55, 187)
HSL	hsl(241, 55%, 47%)
HSV	hsv(241, 71%, 73%)
CMYK	cmyk(69.5%, 70.6%, 0%, 26.7%)
CIE-LAB	lab(32.23, 43.07, -68.80)
CIE-LCH	lch(32.23, 81.17, 302.05°)
OKLab	oklab(43.4% 0.0169 -0.1988)
OKLCH	oklch(43.4% 0.2 274.9)
XYZ	xyz(12.0202, 7.1890, 47.7582)
Luminance	0.0719 (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

#3937BB #B9BB37

analogous

#3777BB #3937BB #7B37BB

triadic

#3937BB #BB3937 #37BB39

tetradic

#3937BB #BB3777 #B9BB37 #37BB7B

square

#3937BB #BB3777 #B9BB37 #37BB7B

split-complementary

#3937BB #BB7B37 #77BB37

monochromatic

#1C1B5C #2B298C #3937BB #615FD0 #908EDE

Accessibility & contrast

On white

8.61

#3937BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#3937BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3937BB

8.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3937BB	#FFFFFF	#000000	##FFFFFF
##3937BB	1.00	8.61	2.44	8.61
#FFFFFF	8.61	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052BF

Deuteranopia (green-blind)

#0046B9

Tritanopia (blue-blind)

#005B75

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #3937bb;
/* rgb */ color: rgb(57, 55, 187);
/* oklch */ color: oklch(43.4% 0.200 274.9);

Tailwind

colors: {
  custom: {
    50: '#816fd1',
    500: '#3937bb',
    950: '#000000',
  },
}

SCSS

$custom: #3937bb;
$custom-light: #816fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#3937bb",
  "rgb": {
    "r": 57,
    "g": 55,
    "b": 187
  },
  "hsl": {
    "h": 240.909,
    "s": 54.545,
    "l": 47.451
  },
  "oklch": {
    "l": 0.43396,
    "c": 0.19956,
    "h": 274.9
  },
  "luminance": 0.0719
}

Semantic roles & 50–950 ramp

primary

#3937BB

secondary

#C8C985

accent

#DE4ADC

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3937BB

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

Preview Lab → · Contrast checker → · Palette generator →