#3729B7#3729B7

#3729B7 is a dark, highly saturated blue. Relative luminance 0.058; OKLCH L 40.9% C 0.209 H 276.3°. Best body text is #FFFFFF at 9.71:1 contrast (WCAG AA passes).

Color values

HEX	#3729B7
RGB	rgb(55, 41, 183)
HSL	hsl(246, 63%, 44%)
HSV	hsv(246, 78%, 72%)
CMYK	cmyk(69.9%, 77.6%, 0%, 28.2%)
CIE-LAB	lab(28.94, 49.30, -71.86)
CIE-LCH	lch(28.94, 87.14, 304.45°)
OKLab	oklab(40.91% 0.0228 -0.2077)
OKLCH	oklch(40.91% 0.209 276.3)
XYZ	xyz(10.9129, 5.8160, 45.3381)
Luminance	0.0582 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3729B7 #A9B729

analogous

#2962B7 #3729B7 #7E29B7

triadic

#3729B7 #B73729 #29B737

tetradic

#3729B7 #B72962 #A9B729 #29B77E

square

#3729B7 #B72962 #A9B729 #29B77E

split-complementary

#3729B7 #B77E29 #62B729

monochromatic

#191353 #281E85 #3729B7 #5547D6 #8479E1

Accessibility & contrast

On white

9.71

#3729B7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#3729B7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3729B7

9.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3729B7	#FFFFFF	#000000	##FFFFFF
##3729B7	1.00	9.71	2.16	9.71
#FFFFFF	9.71	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004ABB

Deuteranopia (green-blind)

#003EB5

Tritanopia (blue-blind)

#00536F

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #3729b7;
/* rgb */ color: rgb(55, 41, 183);
/* oklch */ color: oklch(40.9% 0.209 276.3);

Tailwind

colors: {
  custom: {
    50: '#8166ce',
    500: '#3729b7',
    950: '#000000',
  },
}

SCSS

$custom: #3729b7;
$custom-light: #8166ce;
$custom-dark: #000000;

JSON

{
  "hex": "#3729b7",
  "rgb": {
    "r": 55,
    "g": 41,
    "b": 183
  },
  "hsl": {
    "h": 245.915,
    "s": 63.393,
    "l": 43.922
  },
  "oklch": {
    "l": 0.40906,
    "c": 0.20896,
    "h": 276.3
  },
  "luminance": 0.05817
}

Semantic roles & 50–950 ramp

primary

#3729B7

secondary

#C0C973

accent

#E641D6

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0614

muted

#7D7A82

Preview Lab

Preview with #3729B7

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

Preview Lab → · Contrast checker → · Palette generator →