@excitedsiblings don't stress yourself about that. ask your friend or anybody about that. for me, I will go for the silver theme. a simple but elegant theme I guess will suit your parents.
@proudmom for me i think the best gift you ever give to them is to guide and encourage them to do all good things. help them to adjust for thier new chapter in life.
@fiance28 in my opinion, it's better you held your wedding in the church the traditional ceremony is better, or better ask your fiance, what your fiance want on your wedding day. good luck and congrats in advance on your wedding.