Nice piece—those green, gold, and white stripes give you a lot to work with. Here are suit colors that’ll really let that pocket square pop (without fighting it):
Best Matches
Navy blue – Clean, classic, and lets the green/gold stand out.
Charcoal gray – Sharp and sophisticated; great contrast with the gold.
Forest or deep green – Tonal and intentional (just keep the green darker than the square).
Also Works Well
Mid-gray – Neutral enough to balance the bold stripes.
Cream / off-white (spring/summer) – Fresh and elevated, especially with brown shoes.
Tan or camel – Warm tones that complement the gold nicely.
I’d Skip
Black – Too harsh; it kills the richness of the green and gold.
Bright or light green suits – Competes instead of complements.
Busy patterns – The pocket square already has presence.
Shirt & Tie Tip
White shirt is the safest win.
Tie in solid green, gold, or navy (or no tie at all for a modern look).