#3729BB#3729BB

#3729BB is a dark, highly saturated blue. Relative luminance 0.060; OKLCH L 41.3% C 0.214 H 275.9°. Best body text is #FFFFFF at 9.56:1 contrast (WCAG AA passes).

Color values

HEX	#3729BB
RGB	rgb(55, 41, 187)
HSL	hsl(246, 64%, 45%)
HSV	hsv(246, 78%, 73%)
CMYK	cmyk(70.6%, 78.1%, 0%, 26.7%)
CIE-LAB	lab(29.37, 50.53, -73.52)
CIE-LCH	lch(29.37, 89.21, 304.50°)
OKLab	oklab(41.34% 0.0218 -0.2125)
OKLCH	oklch(41.34% 0.214 275.9)
XYZ	xyz(11.3352, 5.9849, 47.5619)
Luminance	0.0599 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3729BB #ADBB29

analogous

#2964BB #3729BB #8029BB

triadic

#3729BB #BB3729 #29BB37

tetradic

#3729BB #BB2964 #ADBB29 #29BB80

square

#3729BB #BB2964 #ADBB29 #29BB80

split-complementary

#3729BB #BB8029 #64BB29

monochromatic

#191357 #281E89 #3729BB #574AD7 #867CE2

Accessibility & contrast

On white

9.56

#3729BB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#3729BB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3729BB

9.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3729BB	#FFFFFF	#000000	##FFFFFF
##3729BB	1.00	9.56	2.20	9.56
#FFFFFF	9.56	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BBF

Deuteranopia (green-blind)

#003FB8

Tritanopia (blue-blind)

#005571

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #3729bb;
/* rgb */ color: rgb(55, 41, 187);
/* oklch */ color: oklch(41.3% 0.214 275.9);

Tailwind

colors: {
  custom: {
    50: '#8266d1',
    500: '#3729bb',
    950: '#000000',
  },
}

SCSS

$custom: #3729bb;
$custom-light: #8266d1;
$custom-dark: #000000;

JSON

{
  "hex": "#3729bb",
  "rgb": {
    "r": 55,
    "g": 41,
    "b": 187
  },
  "hsl": {
    "h": 245.753,
    "s": 64.035,
    "l": 44.706
  },
  "oklch": {
    "l": 0.41335,
    "c": 0.21365,
    "h": 275.9
  },
  "luminance": 0.05986
}

Semantic roles & 50–950 ramp

primary

#3729BB

secondary

#C2CB75

accent

#E741D7

background

#F8F6FD

surface

#F0EBFA

border

#CBC6D3

text

#0C0614

muted

#7D7A83

Preview Lab

Preview with #3729BB

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

Preview Lab → · Contrast checker → · Palette generator →