#3837B8#3837B8

#3837B8 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 43.0% C 0.196 H 274.7°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#3837B8
RGB	rgb(56, 55, 184)
HSL	hsl(240, 54%, 47%)
HSV	hsv(240, 70%, 72%)
CMYK	cmyk(69.6%, 70.1%, 0%, 27.8%)
CIE-LAB	lab(31.88, 41.96, -67.61)
CIE-LCH	lch(31.88, 79.57, 301.82°)
OKLab	oklab(43.04% 0.0161 -0.1954)
OKLCH	oklch(43.04% 0.196 274.7)
XYZ	xyz(11.6459, 7.0327, 46.0818)
Luminance	0.0703 (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

#3837B8 #B7B837

analogous

#3777B8 #3837B8 #7937B8

triadic

#3837B8 #B83837 #37B838

tetradic

#3837B8 #B83777 #B7B837 #37B879

square

#3837B8 #B83777 #B7B837 #37B879

split-complementary

#3837B8 #B87937 #77B837

monochromatic

#1B1B5A #2A2989 #3837B8 #5E5DCF #8D8DDD

Accessibility & contrast

On white

8.73

#3837B8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#3837B8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3837B8

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3837B8	#FFFFFF	#000000	##FFFFFF
##3837B8	1.00	8.73	2.41	8.73
#FFFFFF	8.73	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.73	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: #3837b8;
/* rgb */ color: rgb(56, 55, 184);
/* oklch */ color: oklch(43.0% 0.196 274.7);

Tailwind

colors: {
  custom: {
    50: '#806fce',
    500: '#3837b8',
    950: '#000000',
  },
}

SCSS

$custom: #3837b8;
$custom-light: #806fce;
$custom-dark: #000000;

JSON

{
  "hex": "#3837b8",
  "rgb": {
    "r": 56,
    "g": 55,
    "b": 184
  },
  "hsl": {
    "h": 240.465,
    "s": 53.975,
    "l": 46.863
  },
  "oklch": {
    "l": 0.43039,
    "c": 0.19604,
    "h": 274.7
  },
  "luminance": 0.07034
}

Semantic roles & 50–950 ramp

primary

#3837B8

secondary

#C7C784

accent

#DD4ADC

background

#F8F6FC

surface

#F0ECF9

border

#CBC7D2

text

#0C0714

muted

#7D7A82

Preview Lab

Preview with #3837B8

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

Preview Lab → · Contrast checker → · Palette generator →