#3728BC#3728BC

#3728BC is a dark, highly saturated blue. Relative luminance 0.060; OKLCH L 41.3% C 0.216 H 275.9°. Best body text is #FFFFFF at 9.58:1 contrast (WCAG AA passes).

Color values

HEX	#3728BC
RGB	rgb(55, 40, 188)
HSL	hsl(246, 65%, 45%)
HSV	hsv(246, 79%, 74%)
CMYK	cmyk(70.7%, 78.7%, 0%, 26.3%)
CIE-LAB	lab(29.31, 51.34, -74.22)
CIE-LCH	lch(29.31, 90.24, 304.67°)
OKLab	oklab(41.32% 0.022 -0.2146)
OKLCH	oklch(41.32% 0.216 275.9)
XYZ	xyz(11.4085, 5.9596, 48.1163)
Luminance	0.0596 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3728BC #ADBC28

analogous

#2863BC #3728BC #8128BC

triadic

#3728BC #BC3728 #28BC37

tetradic

#3728BC #BC2863 #ADBC28 #28BC81

square

#3728BC #BC2863 #ADBC28 #28BC81

split-complementary

#3728BC #BC8128 #63BC28

monochromatic

#191357 #281D8A #3728BC #5749D8 #867BE3

Accessibility & contrast

On white

9.58

#3728BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#3728BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3728BC

9.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3728BC	#FFFFFF	#000000	##FFFFFF
##3728BC	1.00	9.58	2.19	9.58
#FFFFFF	9.58	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BC0

Deuteranopia (green-blind)

#003EB9

Tritanopia (blue-blind)

#005572

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #3728bc;
/* rgb */ color: rgb(55, 40, 188);
/* oklch */ color: oklch(41.3% 0.216 275.9);

Tailwind

colors: {
  custom: {
    50: '#8266d2',
    500: '#3728bc',
    950: '#000000',
  },
}

SCSS

$custom: #3728bc;
$custom-light: #8266d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3728bc",
  "rgb": {
    "r": 55,
    "g": 40,
    "b": 188
  },
  "hsl": {
    "h": 246.081,
    "s": 64.912,
    "l": 44.706
  },
  "oklch": {
    "l": 0.41322,
    "c": 0.21568,
    "h": 275.9
  },
  "luminance": 0.05961
}

Semantic roles & 50–950 ramp

primary

#3728BC

secondary

#C2CB75

accent

#E840D7

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0614

muted

#7D7A83

Preview Lab

Preview with #3728BC

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

Preview Lab → · Contrast checker → · Palette generator →