#3728BA#3728BA

#3728BA is a dark, highly saturated blue. Relative luminance 0.059; OKLCH L 41.1% C 0.213 H 276.1°. Best body text is #FFFFFF at 9.66:1 contrast (WCAG AA passes).

Color values

HEX	#3728BA
RGB	rgb(55, 40, 186)
HSL	hsl(246, 65%, 44%)
HSV	hsv(246, 78%, 73%)
CMYK	cmyk(70.4%, 78.5%, 0%, 27.1%)
CIE-LAB	lab(29.09, 50.73, -73.39)
CIE-LCH	lch(29.09, 89.22, 304.65°)
OKLab	oklab(41.11% 0.0225 -0.2122)
OKLCH	oklch(41.11% 0.213 276.1)
XYZ	xyz(11.1944, 5.8739, 46.9887)
Luminance	0.0587 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3728BA #ABBA28

analogous

#2862BA #3728BA #8028BA

triadic

#3728BA #BA3728 #28BA37

tetradic

#3728BA #BA2862 #ABBA28 #28BA80

square

#3728BA #BA2862 #ABBA28 #28BA80

split-complementary

#3728BA #BA8028 #62BA28

monochromatic

#191255 #281D88 #3728BA #5648D8 #857AE2

Accessibility & contrast

On white

9.66

#3728BA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#3728BA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3728BA

9.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3728BA	#FFFFFF	#000000	##FFFFFF
##3728BA	1.00	9.66	2.17	9.66
#FFFFFF	9.66	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BBE

Deuteranopia (green-blind)

#003EB7

Tritanopia (blue-blind)

#005471

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #3728ba;
/* rgb */ color: rgb(55, 40, 186);
/* oklch */ color: oklch(41.1% 0.213 276.1);

Tailwind

colors: {
  custom: {
    50: '#8266d0',
    500: '#3728ba',
    950: '#000000',
  },
}

SCSS

$custom: #3728ba;
$custom-light: #8266d0;
$custom-dark: #000000;

JSON

{
  "hex": "#3728ba",
  "rgb": {
    "r": 55,
    "g": 40,
    "b": 186
  },
  "hsl": {
    "h": 246.164,
    "s": 64.602,
    "l": 44.314
  },
  "oklch": {
    "l": 0.41105,
    "c": 0.21336,
    "h": 276.1
  },
  "luminance": 0.05875
}

Semantic roles & 50–950 ramp

primary

#3728BA

secondary

#C1CA73

accent

#E840D6

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0614

muted

#7D7A83

Preview Lab

Preview with #3728BA

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

Preview Lab → · Contrast checker → · Palette generator →