I like the dark red, it contrasts well with the tracks and complements the greens.
I do have question regarding a layout like this, how much function can be retained in an 8' long layout? maybe it doesn't have a height change... but could it fit all of the sidings with room for a switcher and a couple of short cars?
interested because I moved to a smaller apartment but I have a 5'x8' storage space in the basement that could be utilized for a small switching layout.