Recently, a friend and I signed up for a series of workshops titled Color: Theory and Practice, hosted by the Berlin Drawing Room.
The series is run by Katy Kirbach and is based on the work of Josef Albers. Specifically, his book, Interaction of Color. There are six workshops in the series, followed by a field trip.
I found out about the Berlin Drawing Room after follow-spamming dozens of art-related pages on Facebook and sifting through the resulting newsfeed noise.
Most of the workshop series the Berlin Drawing Room organizes (past and present) sound interesting, so I had to resist the temptation to sign up to more than one. But they do organize series on an ongoing basis, so hopefully, this is the first of many.