#3728A9#3728A9

#3728A9 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 39.3% C 0.193 H 277.9°. Best body text is #FFFFFF at 10.30:1 contrast (WCAG AA passes).

Color values

HEX	#3728A9
RGB	rgb(55, 40, 169)
HSL	hsl(247, 62%, 41%)
HSV	hsv(247, 76%, 66%)
CMYK	cmyk(67.5%, 76.3%, 0%, 33.7%)
CIE-LAB	lab(27.28, 45.44, -66.23)
CIE-LCH	lch(27.28, 80.32, 304.45°)
OKLab	oklab(39.3% 0.0267 -0.1913)
OKLCH	oklch(39.3% 0.193 277.9)
XYZ	xyz(9.4935, 5.1936, 38.0306)
Luminance	0.0519 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3728A9 #9AA928

analogous

#2859A9 #3728A9 #7728A9

triadic

#3728A9 #A93728 #28A937

tetradic

#3728A9 #A92859 #9AA928 #28A977

square

#3728A9 #A92859 #9AA928 #28A977

split-complementary

#3728A9 #A97728 #59A928

monochromatic

#171146 #271C78 #3728A9 #4E3DD1 #7B6FDD

Accessibility & contrast

On white

10.30

#3728A9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#3728A9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3728A9

10.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3728A9	#FFFFFF	#000000	##FFFFFF
##3728A9	1.00	10.30	2.04	10.30
#FFFFFF	10.30	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046AD

Deuteranopia (green-blind)

#003BA7

Tritanopia (blue-blind)

#004E67

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #3728a9;
/* rgb */ color: rgb(55, 40, 169);
/* oklch */ color: oklch(39.3% 0.193 277.9);

Tailwind

colors: {
  custom: {
    50: '#7e65c4',
    500: '#3728a9',
    950: '#000000',
  },
}

SCSS

$custom: #3728a9;
$custom-light: #7e65c4;
$custom-dark: #000000;

JSON

{
  "hex": "#3728a9",
  "rgb": {
    "r": 55,
    "g": 40,
    "b": 169
  },
  "hsl": {
    "h": 246.977,
    "s": 61.722,
    "l": 40.98
  },
  "oklch": {
    "l": 0.39298,
    "c": 0.19317,
    "h": 277.9
  },
  "luminance": 0.05194
}

Semantic roles & 50–950 ramp

primary

#3728A9

secondary

#B9C469

accent

#E543D2

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #3728A9

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

Preview Lab → · Contrast checker → · Palette generator →