For wedding anniversaries, Sky Blue is considered the traditional color. We run a business devoted to adult milestone celebrations, and the 65 milestone we believe is under-represented in the available party decorating themes. While there are over a dozen different milestone party themes for the 60th birthday milestone, we've only found 2 for the 65th. I've attached a photo of them. One is called Life Is Great and features a multi-color pallet with bright blues, oranges, red, and black accents. The other is called Birthday Stripes and features a bright multi-color set-up heavy on the blues and red. I've attached a photo showing 4 of the typical products.