#3720BB#3720BB

#3720BB is a dark, highly saturated blue. Relative luminance 0.054; OKLCH L 40.3% C 0.221 H 276.6°. Best body text is #FFFFFF at 10.06:1 contrast (WCAG AA passes).

Color values

HEX	#3720BB
RGB	rgb(55, 32, 187)
HSL	hsl(249, 71%, 43%)
HSV	hsv(249, 83%, 73%)
CMYK	cmyk(70.6%, 82.9%, 0%, 26.7%)
CIE-LAB	lab(27.93, 54.73, -75.91)
CIE-LCH	lch(27.93, 93.58, 305.79°)
OKLab	oklab(40.33% 0.0254 -0.2193)
OKLCH	oklch(40.33% 0.221 276.6)
XYZ	xyz(11.0588, 5.4321, 47.4698)
Luminance	0.0543 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3720BB #A4BB20

analogous

#2057BB #3720BB #8420BB

triadic

#3720BB #BB3720 #20BB37

tetradic

#3720BB #BB2057 #A4BB20 #20BB84

square

#3720BB #BB2057 #A4BB20 #20BB84

split-complementary

#3720BB #BB8420 #57BB20

monochromatic

#180E52 #281787 #3720BB #533BDD #816FE6

Accessibility & contrast

On white

10.06

#3720BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#3720BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3720BB

10.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3720BB	#FFFFFF	#000000	##FFFFFF
##3720BB	1.00	10.06	2.09	10.06
#FFFFFF	10.06	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048BF

Deuteranopia (green-blind)

#003BB8

Tritanopia (blue-blind)

#005270

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #3720bb;
/* rgb */ color: rgb(55, 32, 187);
/* oklch */ color: oklch(40.3% 0.221 276.6);

Tailwind

colors: {
  custom: {
    50: '#8362d1',
    500: '#3720bb',
    950: '#000000',
  },
}

SCSS

$custom: #3720bb;
$custom-light: #8362d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3720bb",
  "rgb": {
    "r": 55,
    "g": 32,
    "b": 187
  },
  "hsl": {
    "h": 248.903,
    "s": 70.776,
    "l": 42.941
  },
  "oklch": {
    "l": 0.40334,
    "c": 0.22082,
    "h": 276.6
  },
  "luminance": 0.05433
}

Semantic roles & 50–950 ramp

primary

#3720BB

secondary

#BECD6A

accent

#EE3AD3

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0514

muted

#7D7A83

Preview Lab

Preview with #3720BB

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

Preview Lab → · Contrast checker → · Palette generator →