#3729B2#3729B2

#3729B2 is a dark, highly saturated blue. Relative luminance 0.056; OKLCH L 40.4% C 0.203 H 276.8°. Best body text is #FFFFFF at 9.89:1 contrast (WCAG AA passes).

Color values

HEX	#3729B2
RGB	rgb(55, 41, 178)
HSL	hsl(246, 63%, 43%)
HSV	hsv(246, 77%, 70%)
CMYK	cmyk(69.1%, 77%, 0%, 30.2%)
CIE-LAB	lab(28.41, 47.74, -69.76)
CIE-LCH	lch(28.41, 84.53, 304.38°)
OKLab	oklab(40.37% 0.024 -0.2016)
OKLCH	oklch(40.37% 0.203 276.8)
XYZ	xyz(10.4017, 5.6115, 42.6458)
Luminance	0.0561 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3729B2 #A4B229

analogous

#2960B2 #3729B2 #7B29B2

triadic

#3729B2 #B23729 #29B237

tetradic

#3729B2 #B22960 #A4B229 #29B27B

square

#3729B2 #B22960 #A4B229 #29B27B

split-complementary

#3729B2 #B27B29 #60B229

monochromatic

#18124F #281E80 #3729B2 #5344D4 #8176DF

Accessibility & contrast

On white

9.89

#3729B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#3729B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3729B2

9.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3729B2	#FFFFFF	#000000	##FFFFFF
##3729B2	1.00	9.89	2.12	9.89
#FFFFFF	9.89	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0049B6

Deuteranopia (green-blind)

#003DB0

Tritanopia (blue-blind)

#00526C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #3729b2;
/* rgb */ color: rgb(55, 41, 178);
/* oklch */ color: oklch(40.4% 0.203 276.8);

Tailwind

colors: {
  custom: {
    50: '#8066ca',
    500: '#3729b2',
    950: '#000000',
  },
}

SCSS

$custom: #3729b2;
$custom-light: #8066ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3729b2",
  "rgb": {
    "r": 55,
    "g": 41,
    "b": 178
  },
  "hsl": {
    "h": 246.131,
    "s": 62.557,
    "l": 42.941
  },
  "oklch": {
    "l": 0.40374,
    "c": 0.20303,
    "h": 276.8
  },
  "luminance": 0.05612
}

Semantic roles & 50–950 ramp

primary

#3729B2

secondary

#BEC770

accent

#E642D5

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0613

muted

#7D7A82

Preview Lab

Preview with #3729B2

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

Preview Lab → · Contrast checker → · Palette generator →