Ooo, this reminds me of stained glass (of an abstract kind). My high school art teacher assigned us a project like this once too, and I remember it being very relaxing to color in.

OOOO you know this made me think of stained glass windows-- do you think priests would approve?

I wonder if there is a church in some corner of this world with windows like that. The ones closest that I can think of is La Sagrada Familia de Barcelona-- it is absolutely stunning. You should check it out!