Is color changes in vision normal as you get older?

No. The most common thing affecting color perception would be yellowing of the lens that occurs with development of cataracts. Other retinal and optic nerve diseases can affect color perception as well, though, and a noticeable change should prompt a visit for further evaluation.
Not Normal. Though it is normal to have changes in hearing and taste as we age. Macular degeneration, cataracts, or changes in focal length like myopia or presbyopia, can cause color perception change. Another potential issue with changes in vision would relate to glaucoma and optic nerve damage, the optic nerve can be damaged by numerous different medical issues. Medications, e.g. Digoxin also alter vision.