#3728A7#3728A7

#3728A7 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 39.1% C 0.191 H 278.2°. Best body text is #FFFFFF at 10.38:1 contrast (WCAG AA passes).

Color values

HEX	#3728A7
RGB	rgb(55, 40, 167)
HSL	hsl(247, 61%, 41%)
HSV	hsv(247, 76%, 65%)
CMYK	cmyk(67.1%, 76%, 0%, 34.5%)
CIE-LAB	lab(27.07, 44.81, -65.37)
CIE-LCH	lch(27.07, 79.25, 304.43°)
OKLab	oklab(39.09% 0.0271 -0.1888)
OKLCH	oklch(39.09% 0.191 278.2)
XYZ	xyz(9.3071, 5.1190, 37.0493)
Luminance	0.0512 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3728A7 #98A728

analogous

#2858A7 #3728A7 #7728A7

triadic

#3728A7 #A73728 #28A737

tetradic

#3728A7 #A72858 #98A728 #28A777

square

#3728A7 #A72858 #98A728 #28A777

split-complementary

#3728A7 #A77728 #58A728

monochromatic

#161044 #271C76 #3728A7 #4D3CD0 #7A6DDC

Accessibility & contrast

On white

10.38

#3728A7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#3728A7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3728A7

10.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3728A7	#FFFFFF	#000000	##FFFFFF
##3728A7	1.00	10.38	2.02	10.38
#FFFFFF	10.38	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045AB

Deuteranopia (green-blind)

#003BA5

Tritanopia (blue-blind)

#004D66

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #3728a7;
/* rgb */ color: rgb(55, 40, 167);
/* oklch */ color: oklch(39.1% 0.191 278.2);

Tailwind

colors: {
  custom: {
    50: '#7e65c2',
    500: '#3728a7',
    950: '#000000',
  },
}

SCSS

$custom: #3728a7;
$custom-light: #7e65c2;
$custom-dark: #000000;

JSON

{
  "hex": "#3728a7",
  "rgb": {
    "r": 55,
    "g": 40,
    "b": 167
  },
  "hsl": {
    "h": 247.087,
    "s": 61.353,
    "l": 40.588
  },
  "oklch": {
    "l": 0.39089,
    "c": 0.19074,
    "h": 278.2
  },
  "luminance": 0.0512
}

Semantic roles & 50–950 ramp

primary

#3728A7

secondary

#B8C368

accent

#E443D1

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #3728A7

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

Preview Lab → · Contrast checker → · Palette generator →