I am getting married in June at a beautiful, ornate theatre. The colors inside it are crimsons, burgundies, golds and creams.

I am having a HORRIBLE time nailing down a color scheme for the wedding. I know that my bridesmaids are in gold dresses and I am wearing a cream colored gown, that is being made for me out of many different layers laces and textured fabrics.
I am planning on having a more diy-vintage type wedding, especially since the reception is outdoors. But the ceremony I feel should be a little more classy, to match the surroundings of this theatre.
What colors should I use that would still go with gold and feel summery? And would it be appropriate to have a different color scheme for the outdoor reception... or would that be too much work? I appreciate any help and advice... thank you!