#3729A3#3729A3

#3729A3 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 38.8% C 0.185 H 278.5°. Best body text is #FFFFFF at 10.46:1 contrast (WCAG AA passes).

Color values

HEX	#3729A3
RGB	rgb(55, 41, 163)
HSL	hsl(247, 60%, 40%)
HSV	hsv(247, 75%, 64%)
CMYK	cmyk(66.3%, 74.8%, 0%, 36.1%)
CIE-LAB	lab(26.85, 42.99, -63.31)
CIE-LCH	lch(26.85, 76.52, 304.18°)
OKLab	oklab(38.81% 0.0275 -0.1828)
OKLCH	oklch(38.81% 0.185 278.5)
XYZ	xyz(8.9772, 5.0417, 35.1433)
Luminance	0.0504 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3729A3 #95A329

analogous

#2958A3 #3729A3 #7429A3

triadic

#3729A3 #A33729 #29A337

tetradic

#3729A3 #A32958 #95A329 #29A374

square

#3729A3 #A32958 #95A329 #29A374

split-complementary

#3729A3 #A37429 #58A329

monochromatic

#161041 #261D72 #3729A3 #4C3BCE #796CDA

Accessibility & contrast

On white

10.46

#3729A3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#3729A3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3729A3

10.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3729A3	#FFFFFF	#000000	##FFFFFF
##3729A3	1.00	10.46	2.01	10.46
#FFFFFF	10.46	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044A7

Deuteranopia (green-blind)

#003AA1

Tritanopia (blue-blind)

#004C64

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #3729a3;
/* rgb */ color: rgb(55, 41, 163);
/* oklch */ color: oklch(38.8% 0.185 278.5);

Tailwind

colors: {
  custom: {
    50: '#7d65bf',
    500: '#3729a3',
    950: '#000000',
  },
}

SCSS

$custom: #3729a3;
$custom-light: #7d65bf;
$custom-dark: #000000;

JSON

{
  "hex": "#3729a3",
  "rgb": {
    "r": 55,
    "g": 41,
    "b": 163
  },
  "hsl": {
    "h": 246.885,
    "s": 59.804,
    "l": 40
  },
  "oklch": {
    "l": 0.38813,
    "c": 0.18485,
    "h": 278.5
  },
  "luminance": 0.05042
}

Semantic roles & 50–950 ramp

primary

#3729A3

secondary

#B6C167

accent

#E345D1

background

#F8F6FB

surface

#EFEBF7

border

#CAC6D0

text

#0B0612

muted

#7C7A81

Preview Lab

Preview with #3729A3

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

Preview Lab → · Contrast checker → · Palette generator →