#3728AA#3728AA

#3728AA is a dark, vivid blue. Relative luminance 0.052; OKLCH L 39.4% C 0.194 H 277.8°. Best body text is #FFFFFF at 10.26:1 contrast (WCAG AA passes).

Color values

HEX	#3728AA
RGB	rgb(55, 40, 170)
HSL	hsl(247, 62%, 41%)
HSV	hsv(247, 76%, 67%)
CMYK	cmyk(67.6%, 76.5%, 0%, 33.3%)
CIE-LAB	lab(27.38, 45.75, -66.66)
CIE-LCH	lch(27.38, 80.85, 304.46°)
OKLab	oklab(39.4% 0.0264 -0.1926)
OKLCH	oklch(39.4% 0.194 277.8)
XYZ	xyz(9.5877, 5.2313, 38.5269)
Luminance	0.0523 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3728AA #9BAA28

analogous

#285AAA #3728AA #7828AA

triadic

#3728AA #AA3728 #28AA37

tetradic

#3728AA #AA285A #9BAA28 #28AA78

square

#3728AA #AA285A #9BAA28 #28AA78

split-complementary

#3728AA #AA7828 #5AAA28

monochromatic

#171147 #271C78 #3728AA #4F3ED2 #7C6FDD

Accessibility & contrast

On white

10.26

#3728AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#3728AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3728AA

10.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3728AA	#FFFFFF	#000000	##FFFFFF
##3728AA	1.00	10.26	2.05	10.26
#FFFFFF	10.26	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046AE

Deuteranopia (green-blind)

#003BA8

Tritanopia (blue-blind)

#004E67

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #3728aa;
/* rgb */ color: rgb(55, 40, 170);
/* oklch */ color: oklch(39.4% 0.194 277.8);

Tailwind

colors: {
  custom: {
    50: '#7e65c5',
    500: '#3728aa',
    950: '#000000',
  },
}

SCSS

$custom: #3728aa;
$custom-light: #7e65c5;
$custom-dark: #000000;

JSON

{
  "hex": "#3728aa",
  "rgb": {
    "r": 55,
    "g": 40,
    "b": 170
  },
  "hsl": {
    "h": 246.923,
    "s": 61.905,
    "l": 41.176
  },
  "oklch": {
    "l": 0.39403,
    "c": 0.19438,
    "h": 277.8
  },
  "luminance": 0.05232
}

Semantic roles & 50–950 ramp

primary

#3728AA

secondary

#BAC46A

accent

#E543D2

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #3728AA

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

Preview Lab → · Contrast checker → · Palette generator →