Beam Projector With Unreal Engine

Hi there. I work for a company that is new to media art with Unreal Engine. I recently worked on a piece of media art that uses the Beam Projector, and I’m having trouble getting the colors to come out the way I want them to. If anyone has done media art using the Beam Projector, please help! https://youtube.com/watch?v=Nsv3h3H_Vvs&feature=shared
Starting at 43 seconds in this address is media art using a beam projector.
I was wondering if you use a post-process for beam projectors that allows you to adjust the colors in one go, or if there is another way, please share your information.