#3728AE#3728AE

#3728AE is a dark, vivid blue. Relative luminance 0.054; OKLCH L 39.8% C 0.199 H 277.3°. Best body text is #FFFFFF at 10.11:1 contrast (WCAG AA passes).

Color values

HEX	#3728AE
RGB	rgb(55, 40, 174)
HSL	hsl(247, 63%, 42%)
HSV	hsv(247, 77%, 68%)
CMYK	cmyk(68.4%, 77%, 0%, 31.8%)
CIE-LAB	lab(27.80, 47.01, -68.37)
CIE-LCH	lch(27.80, 82.97, 304.51°)
OKLab	oklab(39.82% 0.0255 -0.1975)
OKLCH	oklch(39.82% 0.199 277.3)
XYZ	xyz(9.9718, 5.3849, 40.5501)
Luminance	0.0539 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3728AE #9FAE28

analogous

#285CAE #3728AE #7A28AE

triadic

#3728AE #AE3728 #28AE37

tetradic

#3728AE #AE285C #9FAE28 #28AE7A

square

#3728AE #AE285C #9FAE28 #28AE7A

split-complementary

#3728AE #AE7A28 #5CAE28

monochromatic

#18114A #271D7C #3728AE #5140D3 #7E72DF

Accessibility & contrast

On white

10.11

#3728AE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#3728AE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3728AE

10.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3728AE	#FFFFFF	#000000	##FFFFFF
##3728AE	1.00	10.11	2.08	10.11
#FFFFFF	10.11	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047B2

Deuteranopia (green-blind)

#003CAC

Tritanopia (blue-blind)

#00506A

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #3728ae;
/* rgb */ color: rgb(55, 40, 174);
/* oklch */ color: oklch(39.8% 0.199 277.3);

Tailwind

colors: {
  custom: {
    50: '#7f65c7',
    500: '#3728ae',
    950: '#000000',
  },
}

SCSS

$custom: #3728ae;
$custom-light: #7f65c7;
$custom-dark: #000000;

JSON

{
  "hex": "#3728ae",
  "rgb": {
    "r": 55,
    "g": 40,
    "b": 174
  },
  "hsl": {
    "h": 246.716,
    "s": 62.617,
    "l": 41.961
  },
  "oklch": {
    "l": 0.39823,
    "c": 0.19918,
    "h": 277.3
  },
  "luminance": 0.05386
}

Semantic roles & 50–950 ramp

primary

#3728AE

secondary

#BCC66C

accent

#E642D3

background

#F8F6FC

surface

#F0EBF8

border

#CBC6D1

text

#0C0613

muted

#7D7A82

Preview Lab

Preview with #3728AE

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

Preview Lab → · Contrast checker → · Palette generator →