#3728AC#3728AC

#3728AC is a dark, vivid blue. Relative luminance 0.053; OKLCH L 39.6% C 0.197 H 277.6°. Best body text is #FFFFFF at 10.19:1 contrast (WCAG AA passes).

Color values

HEX	#3728AC
RGB	rgb(55, 40, 172)
HSL	hsl(247, 62%, 42%)
HSV	hsv(247, 77%, 67%)
CMYK	cmyk(68%, 76.7%, 0%, 32.5%)
CIE-LAB	lab(27.59, 46.38, -67.52)
CIE-LCH	lch(27.59, 81.91, 304.49°)
OKLab	oklab(39.61% 0.026 -0.1951)
OKLCH	oklch(39.61% 0.197 277.6)
XYZ	xyz(9.7783, 5.3075, 39.5309)
Luminance	0.0531 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3728AC #9DAC28

analogous

#285BAC #3728AC #7928AC

triadic

#3728AC #AC3728 #28AC37

tetradic

#3728AC #AC285B #9DAC28 #28AC79

square

#3728AC #AC285B #9DAC28 #28AC79

split-complementary

#3728AC #AC7928 #5BAC28

monochromatic

#171149 #271C7A #3728AC #503FD2 #7D71DE

Accessibility & contrast

On white

10.19

#3728AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#3728AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3728AC

10.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3728AC	#FFFFFF	#000000	##FFFFFF
##3728AC	1.00	10.19	2.06	10.19
#FFFFFF	10.19	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046B0

Deuteranopia (green-blind)

#003CAA

Tritanopia (blue-blind)

#004F69

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #3728ac;
/* rgb */ color: rgb(55, 40, 172);
/* oklch */ color: oklch(39.6% 0.197 277.6);

Tailwind

colors: {
  custom: {
    50: '#7f65c6',
    500: '#3728ac',
    950: '#000000',
  },
}

SCSS

$custom: #3728ac;
$custom-light: #7f65c6;
$custom-dark: #000000;

JSON

{
  "hex": "#3728ac",
  "rgb": {
    "r": 55,
    "g": 40,
    "b": 172
  },
  "hsl": {
    "h": 246.818,
    "s": 62.264,
    "l": 41.569
  },
  "oklch": {
    "l": 0.39612,
    "c": 0.19679,
    "h": 277.6
  },
  "luminance": 0.05308
}

Semantic roles & 50–950 ramp

primary

#3728AC

secondary

#BBC56B

accent

#E542D3

background

#F8F6FC

surface

#F0EBF8

border

#CBC6D1

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #3728AC

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

Preview Lab → · Contrast checker → · Palette generator →