Yes, did the coffee thing, doesn't do enuff. However, I did a search online, there is some expensive stuff from England (about $100) that color-matches the tooth, several tubes to mix. Of course that's cost- and time-prohibitive. BUT I did figure something out by seeing that kit!
When I go to the grocery store this week, I'll buy me some food coloring, mix until I get the right shade, put a tiny bit on the repair clay I have, and perhaps I'll get a match! Eureka! When I do this later on in the week, I'll post back and let everyone know how it worked out.
Otherwise, I'll have to work on my non-smile smile