#3728A3#3728A3

#3728A3 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 38.7% C 0.186 H 278.7°. Best body text is #FFFFFF at 10.53:1 contrast (WCAG AA passes).

Color values

HEX	#3728A3
RGB	rgb(55, 40, 163)
HSL	hsl(247, 61%, 40%)
HSV	hsv(247, 75%, 64%)
CMYK	cmyk(66.3%, 75.5%, 0%, 36.1%)
CIE-LAB	lab(26.66, 43.54, -63.63)
CIE-LCH	lch(26.66, 77.10, 304.38°)
OKLab	oklab(38.67% 0.0281 -0.1837)
OKLCH	oklch(38.67% 0.186 278.7)
XYZ	xyz(8.9431, 4.9734, 35.1319)
Luminance	0.0497 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3728A3 #94A328

analogous

#2857A3 #3728A3 #7528A3

triadic

#3728A3 #A33728 #28A337

tetradic

#3728A3 #A32857 #94A328 #28A375

square

#3728A3 #A32857 #94A328 #28A375

split-complementary

#3728A3 #A37528 #57A328

monochromatic

#161041 #261C72 #3728A3 #4C3ACF #786BDB

Accessibility & contrast

On white

10.53

#3728A3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#3728A3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3728A3

10.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3728A3	#FFFFFF	#000000	##FFFFFF
##3728A3	1.00	10.53	1.99	10.53
#FFFFFF	10.53	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044A7

Deuteranopia (green-blind)

#003AA1

Tritanopia (blue-blind)

#004B64

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #3728a3;
/* rgb */ color: rgb(55, 40, 163);
/* oklch */ color: oklch(38.7% 0.186 278.7);

Tailwind

colors: {
  custom: {
    50: '#7d64bf',
    500: '#3728a3',
    950: '#000000',
  },
}

SCSS

$custom: #3728a3;
$custom-light: #7d64bf;
$custom-dark: #000000;

JSON

{
  "hex": "#3728a3",
  "rgb": {
    "r": 55,
    "g": 40,
    "b": 163
  },
  "hsl": {
    "h": 247.317,
    "s": 60.591,
    "l": 39.804
  },
  "oklch": {
    "l": 0.38675,
    "c": 0.18585,
    "h": 278.7
  },
  "luminance": 0.04974
}

Semantic roles & 50–950 ramp

primary

#3728A3

secondary

#B6C166

accent

#E444D0

background

#F8F6FB

surface

#EFEBF7

border

#CAC6D0

text

#0B0612

muted

#7C7A81

Preview Lab

Preview with #3728A3

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

Preview Lab → · Contrast checker → · Palette generator →