#3837BF#3837BF

#3837BF is a dark, highly saturated blue. Relative luminance 0.073; OKLCH L 43.7% C 0.205 H 274.2°. Best body text is #FFFFFF at 8.51:1 contrast (WCAG AA passes).

Color values

HEX	#3837BF
RGB	rgb(56, 55, 191)
HSL	hsl(240, 55%, 48%)
HSV	hsv(240, 71%, 75%)
CMYK	cmyk(70.7%, 71.2%, 0%, 25.1%)
CIE-LAB	lab(32.55, 44.29, -70.63)
CIE-LCH	lch(32.55, 83.37, 302.09°)
OKLab	oklab(43.73% 0.0151 -0.2042)
OKLCH	oklch(43.73% 0.205 274.2)
XYZ	xyz(12.3979, 7.3335, 50.0422)
Luminance	0.0733 (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

#3837BF #BEBF37

analogous

#377ABF #3837BF #7C37BF

triadic

#3837BF #BF3837 #37BF38

tetradic

#3837BF #BF377A #BEBF37 #37BF7C

square

#3837BF #BF377A #BEBF37 #37BF7C

split-complementary

#3837BF #BF7C37 #7ABF37

monochromatic

#1C1C60 #2A298F #3837BF #6262D2 #9291DF

Accessibility & contrast

On white

8.51

#3837BF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.47

#3837BF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3837BF

8.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3837BF	#FFFFFF	#000000	##FFFFFF
##3837BF	1.00	8.51	2.47	8.51
#FFFFFF	8.51	1.00	21.00	1.00
#000000	2.47	21.00	1.00	21.00
##FFFFFF	8.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053C3

Deuteranopia (green-blind)

#0046BD

Tritanopia (blue-blind)

#005D77

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #3837bf;
/* rgb */ color: rgb(56, 55, 191);
/* oklch */ color: oklch(43.7% 0.205 274.2);

Tailwind

colors: {
  custom: {
    50: '#826fd4',
    500: '#3837bf',
    950: '#000000',
  },
}

SCSS

$custom: #3837bf;
$custom-light: #826fd4;
$custom-dark: #000000;

JSON

{
  "hex": "#3837bf",
  "rgb": {
    "r": 56,
    "g": 55,
    "b": 191
  },
  "hsl": {
    "h": 240.441,
    "s": 55.285,
    "l": 48.235
  },
  "oklch": {
    "l": 0.43725,
    "c": 0.20477,
    "h": 274.2
  },
  "luminance": 0.07335
}

Semantic roles & 50–950 ramp

primary

#3837BF

secondary

#CACA88

accent

#DF49DE

background

#F8F6FD

surface

#F0ECFA

border

#CBC7D3

text

#0C0714

muted

#7D7A83

Preview Lab

Preview with #3837BF

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

Preview Lab → · Contrast checker → · Palette generator →