#3728B6#3728B6

#3728B6 is a dark, highly saturated blue. Relative luminance 0.057; OKLCH L 40.7% C 0.209 H 276.5°. Best body text is #FFFFFF at 9.81:1 contrast (WCAG AA passes).

Color values

HEX	#3728B6
RGB	rgb(55, 40, 182)
HSL	hsl(246, 64%, 44%)
HSV	hsv(246, 78%, 71%)
CMYK	cmyk(69.8%, 78%, 0%, 28.6%)
CIE-LAB	lab(28.66, 49.50, -71.73)
CIE-LCH	lch(28.66, 87.15, 304.60°)
OKLab	oklab(40.67% 0.0235 -0.2073)
OKLCH	oklch(40.67% 0.209 276.5)
XYZ	xyz(10.7751, 5.7062, 44.7805)
Luminance	0.0571 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3728B6 #A7B628

analogous

#2860B6 #3728B6 #7E28B6

triadic

#3728B6 #B63728 #28B637

tetradic

#3728B6 #B62860 #A7B628 #28B67E

square

#3728B6 #B62860 #A7B628 #28B67E

split-complementary

#3728B6 #B67E28 #60B628

monochromatic

#191252 #281D84 #3728B6 #5445D6 #8277E1

Accessibility & contrast

On white

9.81

#3728B6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#3728B6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3728B6

9.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3728B6	#FFFFFF	#000000	##FFFFFF
##3728B6	1.00	9.81	2.14	9.81
#FFFFFF	9.81	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049BA

Deuteranopia (green-blind)

#003DB4

Tritanopia (blue-blind)

#00536E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #3728b6;
/* rgb */ color: rgb(55, 40, 182);
/* oklch */ color: oklch(40.7% 0.209 276.5);

Tailwind

colors: {
  custom: {
    50: '#8165cd',
    500: '#3728b6',
    950: '#000000',
  },
}

SCSS

$custom: #3728b6;
$custom-light: #8165cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3728b6",
  "rgb": {
    "r": 55,
    "g": 40,
    "b": 182
  },
  "hsl": {
    "h": 246.338,
    "s": 63.964,
    "l": 43.529
  },
  "oklch": {
    "l": 0.40675,
    "c": 0.20867,
    "h": 276.5
  },
  "luminance": 0.05707
}

Semantic roles & 50–950 ramp

primary

#3728B6

secondary

#C0C971

accent

#E741D5

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0614

muted

#7D7A82

Preview Lab

Preview with #3728B6

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

Preview Lab → · Contrast checker → · Palette generator →