In need of a little help

So Mark and I were just talking wedding stuff. I had picked a color scheme that I love. Ivory/Sand, Navy, Sage, and Crimson(or wine or burgundy depending on who you ask). My dress and the flower girl’s dress are ivory and the bridesmaids are sage. The men are wearing black tuxes with burgundy ties and vests ( or just ties).

The wedding favors are small herb plants and the tables will be decorated with beach sand, native seashells( mussels and periwinkles mostly) and sea glass. What I can’t figure out is how to work in the navy. Because the wedding is outside under a tent there won’t be many decorations other then the above.

So what I need help with is where can I fit navy in? Do I need to have some decorations? The paper napkins maybe? Help! Please post your suggestions on here so I can use your brains!!!

Thank you sooooo much in advance for your help!