i need some centerpiece ideas. Colors are navy blue, silver and white

I assume you’re not doing floral arrangements? If so, you could have roses navy blue and white. There is also the option of vases where you can include silver and navy blue items in as well. Or even the hurricane glasses with maybe blue lights.

I'm also getting married in October and am considering using baskets of apples as centerpieces. They're in season so they'll be fresh and people can eat them or take them home. Another idea is cupcake bouquets.

You can use blue crystals at the bottom a base put glue around the trim and bling it out. There so many ways look at pinterest the DIY projects and go nuts without breaking the bank