#3729B5#3729B5

#3729B5 is a dark, highly saturated blue. Relative luminance 0.057; OKLCH L 40.7% C 0.207 H 276.5°. Best body text is #FFFFFF at 9.78:1 contrast (WCAG AA passes).

Color values

HEX	#3729B5
RGB	rgb(55, 41, 181)
HSL	hsl(246, 63%, 44%)
HSV	hsv(246, 77%, 71%)
CMYK	cmyk(69.6%, 77.3%, 0%, 29%)
CIE-LAB	lab(28.73, 48.67, -71.02)
CIE-LCH	lch(28.73, 86.10, 304.42°)
OKLab	oklab(40.69% 0.0233 -0.2053)
OKLCH	oklch(40.69% 0.207 276.5)
XYZ	xyz(10.7063, 5.7333, 44.2495)
Luminance	0.0573 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3729B5 #A7B529

analogous

#2961B5 #3729B5 #7D29B5

triadic

#3729B5 #B53729 #29B537

tetradic

#3729B5 #B52961 #A7B529 #29B57D

square

#3729B5 #B52961 #A7B529 #29B57D

split-complementary

#3729B5 #B57D29 #61B529

monochromatic

#191251 #281E83 #3729B5 #5446D5 #8278E0

Accessibility & contrast

On white

9.78

#3729B5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#3729B5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3729B5

9.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3729B5	#FFFFFF	#000000	##FFFFFF
##3729B5	1.00	9.78	2.15	9.78
#FFFFFF	9.78	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AB9

Deuteranopia (green-blind)

#003EB3

Tritanopia (blue-blind)

#00536E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #3729b5;
/* rgb */ color: rgb(55, 41, 181);
/* oklch */ color: oklch(40.7% 0.207 276.5);

Tailwind

colors: {
  custom: {
    50: '#8166cd',
    500: '#3729b5',
    950: '#000000',
  },
}

SCSS

$custom: #3729b5;
$custom-light: #8166cd;
$custom-dark: #000000;

JSON

{
  "hex": "#3729b5",
  "rgb": {
    "r": 55,
    "g": 41,
    "b": 181
  },
  "hsl": {
    "h": 246,
    "s": 63.063,
    "l": 43.529
  },
  "oklch": {
    "l": 0.40693,
    "c": 0.20659,
    "h": 276.5
  },
  "luminance": 0.05734
}

Semantic roles & 50–950 ramp

primary

#3729B5

secondary

#C0C872

accent

#E642D6

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0614

muted

#7D7A82

Preview Lab

Preview with #3729B5

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

Preview Lab → · Contrast checker → · Palette generator →