Not really any themes in my house. But,

Bathroom- Seashell/beach ish but cream walls.
My room- Flowers kind of (bed spread,curtains, and I have fake flowers in a few places), but cream walls.
Brothers room- Cream walls and like kinda beige "theme".
Parents room- No theme. really.
Kitchen- No theme. (Cream walls are almost all walls in house....)
Living room,dining room, and family room-no themes.
Basement- Blue Walls..