Red boxcar colors

[Rscott417]

I'm looking to paint and decal 4 or 5 boxcars but I don't want them all to be the same color red. I've used pollyscale mineral red which I'll use again but was wondering what colors are close to mineral red without looking exactly the same. I've thought about oxide red or roof red but not sure if those are more brown than red. Also what color do others use for the roof of a boxcar when it's not painted the same body color, silver or a tin color?

And since I had mentioned decaling them what set is just plain white letter and numbers, not stenciled or a roman or gothic style.