After badmouthing the garish red paint* on the combine in my previous post, I figured I'd better present my preferences, or at least the process for determining my choice. I'm following a suggested scheme by Selley for their passenger cars. I'll admit that when I first read it I dismissed it, but after searching and seeing what others had done I came back to it and embraced it. It's basically this: roof - black or brown, sides and ends - Tuscan red, trucks and platform details - olive green, underbody and select details - black. So, I pulled my colors I thought might work and began making color swatches on a sheet painted with the same primer I'm using on the cars.
Below, the choices I'm leaning towards. Or, mellow traffic signals. You decide.
*I should admit that many great passenger trains have been a bright red or similarly bold rosy hue. John Allen's streamlined passenger train was painted Mandarin Red, as was his little combine that worked the branch line out of Gorre up to Daphetid. Perhaps that was the inspiration for the little combine I found.