#3728A2#3728A2

#3728A2 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 38.6% C 0.185 H 278.8°. Best body text is #FFFFFF at 10.57:1 contrast (WCAG AA passes).

Color values

HEX	#3728A2
RGB	rgb(55, 40, 162)
HSL	hsl(247, 60%, 40%)
HSV	hsv(247, 75%, 64%)
CMYK	cmyk(66%, 75.3%, 0%, 36.5%)
CIE-LAB	lab(26.56, 43.22, -63.19)
CIE-LCH	lch(26.56, 76.56, 304.37°)
OKLab	oklab(38.57% 0.0283 -0.1824)
OKLCH	oklch(38.57% 0.185 278.8)
XYZ	xyz(8.8538, 4.9377, 34.6619)
Luminance	0.0494 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3728A2 #93A228

analogous

#2856A2 #3728A2 #7428A2

triadic

#3728A2 #A23728 #28A237

tetradic

#3728A2 #A22856 #93A228 #28A274

square

#3728A2 #A22856 #93A228 #28A274

split-complementary

#3728A2 #A27428 #56A228

monochromatic

#161040 #261C71 #3728A2 #4B39CE #786ADA

Accessibility & contrast

On white

10.57

#3728A2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#3728A2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3728A2

10.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3728A2	#FFFFFF	#000000	##FFFFFF
##3728A2	1.00	10.57	1.99	10.57
#FFFFFF	10.57	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0043A6

Deuteranopia (green-blind)

#003AA0

Tritanopia (blue-blind)

#004B63

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #3728a2;
/* rgb */ color: rgb(55, 40, 162);
/* oklch */ color: oklch(38.6% 0.185 278.8);

Tailwind

colors: {
  custom: {
    50: '#7d64bf',
    500: '#3728a2',
    950: '#000000',
  },
}

SCSS

$custom: #3728a2;
$custom-light: #7d64bf;
$custom-dark: #000000;

JSON

{
  "hex": "#3728a2",
  "rgb": {
    "r": 55,
    "g": 40,
    "b": 162
  },
  "hsl": {
    "h": 247.377,
    "s": 60.396,
    "l": 39.608
  },
  "oklch": {
    "l": 0.38572,
    "c": 0.18463,
    "h": 278.8
  },
  "luminance": 0.04938
}

Semantic roles & 50–950 ramp

primary

#3728A2

secondary

#B5C165

accent

#E444D0

background

#F8F6FB

surface

#EFEBF7

border

#CAC6D0

text

#0B0612

muted

#7C7A81

Preview Lab

Preview with #3728A2

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

Preview Lab → · Contrast checker → · Palette generator →