How does the color of of Cu-Ni small cents change with age?

Dawg144

I just noticed today that TPGs don't give RD, RB and BN designations to the copper-nickel Flying Eagle and Indian Head cents (yeah, I know, it took me awhile ). However, I have noticed that there is definitely some color variation between fresh-off-the-press red-brown FEs and Indians and their tan-brown circulated counterparts. Is the variation just not significant enough to warrant a brown through red designation spectrum? How "red" can a copper-nickel cent be?

Thanks in advance.

NumisOxide

Good question was wondering this myself.

EagleEye

They don't include a color designation for same reason they don't put color designations on other nickel (and silver) coins.