This pocket square has a rich, multicolor palette—burgundy, green, royal blue, teal, purple, rust, gold, and brown—so you have quite a few strong suit options.
Best suit colors: 
Navy blue — Best overall
Makes the royal blue and teal stripes stand out.
Looks polished and versatile for business or evening wear.
Charcoal gray — ⭐ Excellent
Provides a neutral foundation for all the colors.
Especially good if you want the pocket square to be the focal point.
Medium or dark gray
Works beautifully with the burgundy, purple, blue, and green.
Great for a sophisticated dressier look.
Burgundy / deep wine
Picks up the burgundy edging and stripes.
Creates a bold, coordinated appearance without being overly flashy.
Chocolate brown / dark brown
Complements the brown, gold, rust, and green tones.
Gives the outfit a warm, distinctive appearance.
Black
A strong choice for formal or evening wear.
The vivid blue, green, purple, and burgundy will really pop.
Camel / tan
Excellent for a more relaxed, stylish look.
Pulls out the gold, rust, brown, and green tones.
Cream / ivory
Works particularly well if you're wearing the square with a lighter summer suit.
Gives the colorful pattern a softer appearance.