#3729A7#3729A7

#3729A7 is a dark, vivid blue. Relative luminance 0.052; OKLCH L 39.2% C 0.190 H 278.0°. Best body text is #FFFFFF at 10.31:1 contrast (WCAG AA passes).

Color values

HEX	#3729A7
RGB	rgb(55, 41, 167)
HSL	hsl(247, 61%, 41%)
HSV	hsv(247, 75%, 65%)
CMYK	cmyk(67.1%, 75.4%, 0%, 34.5%)
CIE-LAB	lab(27.26, 44.27, -65.05)
CIE-LCH	lch(27.26, 78.69, 304.24°)
OKLab	oklab(39.22% 0.0266 -0.1879)
OKLCH	oklch(39.22% 0.19 278)
XYZ	xyz(9.3413, 5.1873, 37.0607)
Luminance	0.0519 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3729A7 #99A729

analogous

#295AA7 #3729A7 #7629A7

triadic

#3729A7 #A73729 #29A737

tetradic

#3729A7 #A7295A #99A729 #29A776

square

#3729A7 #A7295A #99A729 #29A776

split-complementary

#3729A7 #A77629 #5AA729

monochromatic

#171145 #271D76 #3729A7 #4E3ED0 #7B6FDC

Accessibility & contrast

On white

10.31

#3729A7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#3729A7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3729A7

10.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3729A7	#FFFFFF	#000000	##FFFFFF
##3729A7	1.00	10.31	2.04	10.31
#FFFFFF	10.31	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045AB

Deuteranopia (green-blind)

#003BA5

Tritanopia (blue-blind)

#004D66

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #3729a7;
/* rgb */ color: rgb(55, 41, 167);
/* oklch */ color: oklch(39.2% 0.190 278.0);

Tailwind

colors: {
  custom: {
    50: '#7e65c2',
    500: '#3729a7',
    950: '#000000',
  },
}

SCSS

$custom: #3729a7;
$custom-light: #7e65c2;
$custom-dark: #000000;

JSON

{
  "hex": "#3729a7",
  "rgb": {
    "r": 55,
    "g": 41,
    "b": 167
  },
  "hsl": {
    "h": 246.667,
    "s": 60.577,
    "l": 40.784
  },
  "oklch": {
    "l": 0.39224,
    "c": 0.18976,
    "h": 278
  },
  "luminance": 0.05188
}

Semantic roles & 50–950 ramp

primary

#3729A7

secondary

#B9C269

accent

#E444D2

background

#F8F6FC

surface

#EFEBF8

border

#CAC6D1

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #3729A7

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

Preview Lab → · Contrast checker → · Palette generator →