15mm Russian Trains station

I'm really  not sure which  colors to use for this one.
What I'm thinking is as follows.
1. The foundation and platform : grey
2. Bricks under the chipped walls: red/orange...
3. Roof : green like church? or tin color like the house.
4. The walls are smooth plaster unlike the rough texture of the houses..same creme color or would beige or even Indian red or Green be a better idea?

Welp any ideas I'd appreciate.