siding color and landscape opinion

[Anuja Savaskar]

Hello BP, 

Need some help on the choosing exterior color combination on this house. Repainting the exterior with these SW Repose gray (siding), SW snowbound white(trims) and SW rave red(door) but anyone with experience has some suggestions on whether to use 1 color on siding or paint horizontal and vertical siding with 2 different colors? 

Also any advice on whether to, remove the tree in the front or keep it, trim it and give it a good shape? In spring it will enhance the beauty but it looks ugly right now.