>>7708356
generally speaking, composition. color theory is one part of it. many books on the topic out there

>>7708356
There is a lot of great abstract art that doesn't go deep into theory also... expressiveness is a big part of it. I don't know how better to describe it, but good abstract art makes me feel something when I see it.

>>7708973
I think composition comes after you learn how to express yourself and paint without thinking about "is this good?".
You got to be able to paint from your soul without worrying about what's right and wrong, and that's surprisingly hard for a lot of people. To the point where someone's going to reply to me and say its not even real. (the soul, that is)

>>7709016
that's not very helpful anon

>>7708356
Study the best abstract painters in history.