You could go to a local auto-body shop and ask about candy color paint. It could be expensive. Then it is just a matter of painting on the glass with the see through paint. Perhaps it would make more sense to have a local body shop do the painting as difference in paint thickness will change its color. Maybe a spray can can be bought. Doing it with a brush is guaranteed to not give a single color of red (or other colors) from the same can applied at the same time.