If we are going to go down the color combination route,
How about late building, red roof, red support, green base
How about the Hyde Park station, with green underside of roof and red top of roof (see left station below and note roof lip on right)
To round this off, how about some box variations. From Upper Left to Right c. 1918 1/12 dozen #90 Passenger Station, #93 Freight station, #91 Fast Freight, late #234 Suburban Station, and then Lower Left to Right c. 1920-21 #90 Station, #93 Suburban Station, #90 Hyde Park Station, and another 234 Suburban Station.