Hi, there's already a Material Skin for Poweramp but there isn't any Black Material Skin. It could help boost users battery life. (If you're using an AMOLED display)
And overall it'll look amazing!
Please make one.
Something like this
https://goo.gl/8dhZ2Y
https://goo.gl/zvjmO3
https://goo.gl/6O9YqC
(Made this by editing the screenshot. I wish I knew how to theme)