#3729B0#3729B0

#3729B0 is a dark, highly saturated blue. Relative luminance 0.055; OKLCH L 40.2% C 0.201 H 277.0°. Best body text is #FFFFFF at 9.97:1 contrast (WCAG AA passes).

Color values

HEX	#3729B0
RGB	rgb(55, 41, 176)
HSL	hsl(246, 62%, 43%)
HSV	hsv(246, 77%, 69%)
CMYK	cmyk(68.8%, 76.7%, 0%, 31%)
CIE-LAB	lab(28.20, 47.11, -68.91)
CIE-LCH	lch(28.20, 83.48, 304.36°)
OKLab	oklab(40.16% 0.0245 -0.1991)
OKLCH	oklch(40.16% 0.201 277)
XYZ	xyz(10.2024, 5.5318, 41.5960)
Luminance	0.0553 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3729B0 #A2B029

analogous

#295FB0 #3729B0 #7A29B0

triadic

#3729B0 #B03729 #29B037

tetradic

#3729B0 #B0295F #A2B029 #29B07A

square

#3729B0 #B0295F #A2B029 #29B07A

split-complementary

#3729B0 #B07A29 #5FB029

monochromatic

#18124D #271D7E #3729B0 #5243D3 #8075DF

Accessibility & contrast

On white

9.97

#3729B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#3729B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3729B0

9.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3729B0	#FFFFFF	#000000	##FFFFFF
##3729B0	1.00	9.97	2.11	9.97
#FFFFFF	9.97	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048B4

Deuteranopia (green-blind)

#003DAE

Tritanopia (blue-blind)

#00516B

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #3729b0;
/* rgb */ color: rgb(55, 41, 176);
/* oklch */ color: oklch(40.2% 0.201 277.0);

Tailwind

colors: {
  custom: {
    50: '#7f66c9',
    500: '#3729b0',
    950: '#000000',
  },
}

SCSS

$custom: #3729b0;
$custom-light: #7f66c9;
$custom-dark: #000000;

JSON

{
  "hex": "#3729b0",
  "rgb": {
    "r": 55,
    "g": 41,
    "b": 176
  },
  "hsl": {
    "h": 246.222,
    "s": 62.212,
    "l": 42.549
  },
  "oklch": {
    "l": 0.40163,
    "c": 0.20065,
    "h": 277
  },
  "luminance": 0.05533
}

Semantic roles & 50–950 ramp

primary

#3729B0

secondary

#BDC66F

accent

#E543D4

background

#F8F6FC

surface

#F0EBF8

border

#CBC6D1

text

#0C0613

muted

#7D7A82

Preview Lab

Preview with #3729B0

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

Preview Lab → · Contrast checker → · Palette generator →