Help!

Shelby • || 27 || 2 under 2 || Bohemian Soul || Travel Bug || Connect With Me(:
I posted this under another topic as well I think it would fit better under "Style" so I'm going to ask again incase it's deleted on the other.. 
So I'm trying to plan my moms 50th birthday party and I have no idea what color scheme to use. The restaurant it's held at is right on the water during the end of July! Any advice or ideas for the party would be greatly appreciated!(: