#3937B5#3937B5

#3937B5 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.8% C 0.192 H 275.3°. Best body text is #FFFFFF at 8.80:1 contrast (WCAG AA passes).

Color values

HEX	#3937B5
RGB	rgb(57, 55, 181)
HSL	hsl(241, 53%, 46%)
HSV	hsv(241, 70%, 71%)
CMYK	cmyk(68.5%, 69.6%, 0%, 29%)
CIE-LAB	lab(31.66, 41.07, -66.18)
CIE-LCH	lch(31.66, 77.89, 301.82°)
OKLab	oklab(42.81% 0.0178 -0.1912)
OKLCH	oklch(42.81% 0.192 275.3)
XYZ	xyz(11.3913, 6.9374, 44.4458)
Luminance	0.0694 (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

#3937B5 #B3B537

analogous

#3774B5 #3937B5 #7837B5

triadic

#3937B5 #B53937 #37B539

tetradic

#3937B5 #B53774 #B3B537 #37B578

square

#3937B5 #B53774 #B3B537 #37B578

split-complementary

#3937B5 #B57837 #74B537

monochromatic

#1B1A57 #2A2986 #3937B5 #5E5CCD #8C8BDC

Accessibility & contrast

On white

8.80

#3937B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#3937B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3937B5

8.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3937B5	#FFFFFF	#000000	##FFFFFF
##3937B5	1.00	8.80	2.39	8.80
#FFFFFF	8.80	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B9

Deuteranopia (green-blind)

#0045B3

Tritanopia (blue-blind)

#005972

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #3937b5;
/* rgb */ color: rgb(57, 55, 181);
/* oklch */ color: oklch(42.8% 0.192 275.3);

Tailwind

colors: {
  custom: {
    50: '#806fcc',
    500: '#3937b5',
    950: '#000000',
  },
}

SCSS

$custom: #3937b5;
$custom-light: #806fcc;
$custom-dark: #000000;

JSON

{
  "hex": "#3937b5",
  "rgb": {
    "r": 57,
    "g": 55,
    "b": 181
  },
  "hsl": {
    "h": 240.952,
    "s": 53.39,
    "l": 46.275
  },
  "oklch": {
    "l": 0.42814,
    "c": 0.19202,
    "h": 275.3
  },
  "luminance": 0.06938
}

Semantic roles & 50–950 ramp

primary

#3937B5

secondary

#C5C682

accent

#DD4BDA

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3937B5

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

Preview Lab → · Contrast checker → · Palette generator →