#3729AB#3729AB

#3729AB is a dark, vivid blue. Relative luminance 0.053; OKLCH L 39.6% C 0.195 H 277.6°. Best body text is #FFFFFF at 10.16:1 contrast (WCAG AA passes).

Color values

HEX	#3729AB
RGB	rgb(55, 41, 171)
HSL	hsl(246, 61%, 42%)
HSV	hsv(246, 76%, 67%)
CMYK	cmyk(67.8%, 76%, 0%, 32.9%)
CIE-LAB	lab(27.68, 45.54, -66.78)
CIE-LCH	lch(27.68, 80.83, 304.29°)
OKLab	oklab(39.64% 0.0256 -0.1929)
OKLCH	oklch(39.64% 0.195 277.6)
XYZ	xyz(9.7168, 5.3375, 39.0384)
Luminance	0.0534 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3729AB #9DAB29

analogous

#295CAB #3729AB #7829AB

triadic

#3729AB #AB3729 #29AB37

tetradic

#3729AB #AB295C #9DAB29 #29AB78

square

#3729AB #AB295C #9DAB29 #29AB78

split-complementary

#3729AB #AB7829 #5CAB29

monochromatic

#171148 #271D7A #3729AB #5040D1 #7D71DD

Accessibility & contrast

On white

10.16

#3729AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#3729AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3729AB

10.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3729AB	#FFFFFF	#000000	##FFFFFF
##3729AB	1.00	10.16	2.07	10.16
#FFFFFF	10.16	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047AF

Deuteranopia (green-blind)

#003CA9

Tritanopia (blue-blind)

#004F68

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #3729ab;
/* rgb */ color: rgb(55, 41, 171);
/* oklch */ color: oklch(39.6% 0.195 277.6);

Tailwind

colors: {
  custom: {
    50: '#7e65c5',
    500: '#3729ab',
    950: '#000000',
  },
}

SCSS

$custom: #3729ab;
$custom-light: #7e65c5;
$custom-dark: #000000;

JSON

{
  "hex": "#3729ab",
  "rgb": {
    "r": 55,
    "g": 41,
    "b": 171
  },
  "hsl": {
    "h": 246.462,
    "s": 61.321,
    "l": 41.569
  },
  "oklch": {
    "l": 0.39639,
    "c": 0.19462,
    "h": 277.6
  },
  "luminance": 0.05338
}

Semantic roles & 50–950 ramp

primary

#3729AB

secondary

#BBC46C

accent

#E443D3

background

#F8F6FC

surface

#F0EBF8

border

#CBC6D1

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #3729AB

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

Preview Lab → · Contrast checker → · Palette generator →