#3729BD#3729BD

#3729BD is a dark, highly saturated blue. Relative luminance 0.061; OKLCH L 41.5% C 0.216 H 275.7°. Best body text is #FFFFFF at 9.48:1 contrast (WCAG AA passes).

Color values

HEX	#3729BD
RGB	rgb(55, 41, 189)
HSL	hsl(246, 64%, 45%)
HSV	hsv(246, 78%, 74%)
CMYK	cmyk(70.9%, 78.3%, 0%, 25.9%)
CIE-LAB	lab(29.59, 51.15, -74.34)
CIE-LCH	lch(29.59, 90.24, 304.53°)
OKLab	oklab(41.55% 0.0213 -0.2149)
OKLCH	oklch(41.55% 0.216 275.7)
XYZ	xyz(11.5508, 6.0711, 48.6974)
Luminance	0.0607 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3729BD #AFBD29

analogous

#2965BD #3729BD #8129BD

triadic

#3729BD #BD3729 #29BD37

tetradic

#3729BD #BD2965 #AFBD29 #29BD81

square

#3729BD #BD2965 #AFBD29 #29BD81

split-complementary

#3729BD #BD8129 #65BD29

monochromatic

#1A1358 #281E8B #3729BD #594BD8 #877DE3

Accessibility & contrast

On white

9.48

#3729BD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#3729BD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3729BD

9.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3729BD	#FFFFFF	#000000	##FFFFFF
##3729BD	1.00	9.48	2.21	9.48
#FFFFFF	9.48	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CC1

Deuteranopia (green-blind)

#003FBA

Tritanopia (blue-blind)

#005673

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #3729bd;
/* rgb */ color: rgb(55, 41, 189);
/* oklch */ color: oklch(41.5% 0.216 275.7);

Tailwind

colors: {
  custom: {
    50: '#8266d2',
    500: '#3729bd',
    950: '#000000',
  },
}

SCSS

$custom: #3729bd;
$custom-light: #8266d2;
$custom-dark: #000000;

JSON

{
  "hex": "#3729bd",
  "rgb": {
    "r": 55,
    "g": 41,
    "b": 189
  },
  "hsl": {
    "h": 245.676,
    "s": 64.348,
    "l": 45.098
  },
  "oklch": {
    "l": 0.4155,
    "c": 0.21599,
    "h": 275.7
  },
  "luminance": 0.06072
}

Semantic roles & 50–950 ramp

primary

#3729BD

secondary

#C3CB77

accent

#E740D8

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0614

muted

#7D7A83

Preview Lab

Preview with #3729BD

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

Preview Lab → · Contrast checker → · Palette generator →