#3729B4#3729B4

#3729B4 is a dark, highly saturated blue. Relative luminance 0.057; OKLCH L 40.6% C 0.205 H 276.6°. Best body text is #FFFFFF at 9.82:1 contrast (WCAG AA passes).

Color values

HEX	#3729B4
RGB	rgb(55, 41, 180)
HSL	hsl(246, 63%, 43%)
HSV	hsv(246, 77%, 71%)
CMYK	cmyk(69.4%, 77.2%, 0%, 29.4%)
CIE-LAB	lab(28.62, 48.36, -70.60)
CIE-LCH	lch(28.62, 85.58, 304.41°)
OKLab	oklab(40.59% 0.0235 -0.2041)
OKLCH	oklch(40.59% 0.205 276.6)
XYZ	xyz(10.6040, 5.6924, 43.7111)
Luminance	0.0569 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3729B4 #A6B429

analogous

#2960B4 #3729B4 #7C29B4

triadic

#3729B4 #B43729 #29B437

tetradic

#3729B4 #B42960 #A6B429 #29B47C

square

#3729B4 #B42960 #A6B429 #29B47C

split-complementary

#3729B4 #B47C29 #60B429

monochromatic

#191250 #281E82 #3729B4 #5445D5 #8277E0

Accessibility & contrast

On white

9.82

#3729B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#3729B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3729B4

9.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3729B4	#FFFFFF	#000000	##FFFFFF
##3729B4	1.00	9.82	2.14	9.82
#FFFFFF	9.82	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049B8

Deuteranopia (green-blind)

#003DB2

Tritanopia (blue-blind)

#00526D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #3729b4;
/* rgb */ color: rgb(55, 41, 180);
/* oklch */ color: oklch(40.6% 0.205 276.6);

Tailwind

colors: {
  custom: {
    50: '#8066cc',
    500: '#3729b4',
    950: '#000000',
  },
}

SCSS

$custom: #3729b4;
$custom-light: #8066cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3729b4",
  "rgb": {
    "r": 55,
    "g": 41,
    "b": 180
  },
  "hsl": {
    "h": 246.043,
    "s": 62.896,
    "l": 43.333
  },
  "oklch": {
    "l": 0.40586,
    "c": 0.20541,
    "h": 276.6
  },
  "luminance": 0.05693
}

Semantic roles & 50–950 ramp

primary

#3729B4

secondary

#BFC871

accent

#E642D5

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0614

muted

#7D7A82

Preview Lab

Preview with #3729B4

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

Preview Lab → · Contrast checker → · Palette generator →