#3729B9#3729B9

#3729B9 is a dark, highly saturated blue. Relative luminance 0.059; OKLCH L 41.1% C 0.211 H 276.1°. Best body text is #FFFFFF at 9.63:1 contrast (WCAG AA passes).

Color values

HEX	#3729B9
RGB	rgb(55, 41, 185)
HSL	hsl(246, 64%, 44%)
HSV	hsv(246, 78%, 73%)
CMYK	cmyk(70.3%, 77.8%, 0%, 27.5%)
CIE-LAB	lab(29.16, 49.92, -72.69)
CIE-LCH	lch(29.16, 88.18, 304.48°)
OKLab	oklab(41.12% 0.0223 -0.2101)
OKLCH	oklch(41.12% 0.211 276.1)
XYZ	xyz(11.1226, 5.8998, 46.4422)
Luminance	0.0590 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3729B9 #ABB929

analogous

#2963B9 #3729B9 #7F29B9

triadic

#3729B9 #B93729 #29B937

tetradic

#3729B9 #B92963 #ABB929 #29B97F

square

#3729B9 #B92963 #ABB929 #29B97F

split-complementary

#3729B9 #B97F29 #63B929

monochromatic

#191355 #281E87 #3729B9 #5649D7 #857BE2

Accessibility & contrast

On white

9.63

#3729B9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#3729B9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3729B9

9.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3729B9	#FFFFFF	#000000	##FFFFFF
##3729B9	1.00	9.63	2.18	9.63
#FFFFFF	9.63	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BBD

Deuteranopia (green-blind)

#003EB6

Tritanopia (blue-blind)

#005470

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #3729b9;
/* rgb */ color: rgb(55, 41, 185);
/* oklch */ color: oklch(41.1% 0.211 276.1);

Tailwind

colors: {
  custom: {
    50: '#8166cf',
    500: '#3729b9',
    950: '#000000',
  },
}

SCSS

$custom: #3729b9;
$custom-light: #8166cf;
$custom-dark: #000000;

JSON

{
  "hex": "#3729b9",
  "rgb": {
    "r": 55,
    "g": 41,
    "b": 185
  },
  "hsl": {
    "h": 245.833,
    "s": 63.717,
    "l": 44.314
  },
  "oklch": {
    "l": 0.4112,
    "c": 0.21132,
    "h": 276.1
  },
  "luminance": 0.05901
}

Semantic roles & 50–950 ramp

primary

#3729B9

secondary

#C1CA74

accent

#E741D7

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0614

muted

#7D7A82

Preview Lab

Preview with #3729B9

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

Preview Lab → · Contrast checker → · Palette generator →