#3937B8#3937B8

#3937B8 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 43.1% C 0.196 H 275.1°. Best body text is #FFFFFF at 8.70:1 contrast (WCAG AA passes).

Color values

HEX	#3937B8
RGB	rgb(57, 55, 184)
HSL	hsl(241, 54%, 47%)
HSV	hsv(241, 70%, 72%)
CMYK	cmyk(69%, 70.1%, 0%, 27.8%)
CIE-LAB	lab(31.95, 42.07, -67.50)
CIE-LCH	lch(31.95, 79.53, 301.94°)
OKLab	oklab(43.1% 0.0173 -0.195)
OKLCH	oklch(43.1% 0.196 275.1)
XYZ	xyz(11.7024, 7.0618, 46.0845)
Luminance	0.0706 (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

#3937B8 #B6B837

analogous

#3776B8 #3937B8 #7A37B8

triadic

#3937B8 #B83937 #37B839

tetradic

#3937B8 #B83776 #B6B837 #37B87A

square

#3937B8 #B83776 #B6B837 #37B87A

split-complementary

#3937B8 #B87A37 #76B837

monochromatic

#1C1B5A #2A2989 #3937B8 #5F5DCF #8E8DDD

Accessibility & contrast

On white

8.70

#3937B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#3937B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3937B8

8.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3937B8	#FFFFFF	#000000	##FFFFFF
##3937B8	1.00	8.70	2.41	8.70
#FFFFFF	8.70	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051BC

Deuteranopia (green-blind)

#0045B6

Tritanopia (blue-blind)

#005A73

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #3937b8;
/* rgb */ color: rgb(57, 55, 184);
/* oklch */ color: oklch(43.1% 0.196 275.1);

Tailwind

colors: {
  custom: {
    50: '#816fce',
    500: '#3937b8',
    950: '#000000',
  },
}

SCSS

$custom: #3937b8;
$custom-light: #816fce;
$custom-dark: #000000;

JSON

{
  "hex": "#3937b8",
  "rgb": {
    "r": 57,
    "g": 55,
    "b": 184
  },
  "hsl": {
    "h": 240.93,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.43104,
    "c": 0.1958,
    "h": 275.1
  },
  "luminance": 0.07063
}

Semantic roles & 50–950 ramp

primary

#3937B8

secondary

#C6C784

accent

#DD4ADB

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3937B8

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

Preview Lab → · Contrast checker → · Palette generator →