The words "under the color of law" are very important. Can I as an individual deprive you of your Constitutional Rights?

The quick answer is NO!

The Constitution is a social contract between you and the Federal Government, and between the Federal Government and the States but not between two individual citizens.

A key element is some sort of "governmental action or authority".

For instance a teacher in the classroom IS a governmental agent and thus can deprive a student of a Constitutional right but that same teacher outside of the classroom and off campus can not.

Great article by the way.