Steam Tender Marker Lights

What color are the steam tender marker lights?

Does each type of locomotive differ from one another?

Would like to add some jewels to the back of my tenders.

I was thinking red would be right but not sure?

Thanks,

Mark

Red to the rear works for everybody. Yellow to the sides and front work for Santa Fe, N&W, Pennsy and (I think) D&RGW. Everybody else showed green to the sides and front. Note that this applies to tenders only. The class lights (generally refered to by MRRs incorrectly as markers) are a diferent story and show either white(for extra unscheduled trains) or green (for a section of a scheduled train w/ another section following) from all openings of the fixture.