add dark background behind player

[Gingeh]

[elkrien]

Please keep formatting the same as in rest of code (colors are with capital letters). Also for latte I think contrast between colors is too big, crust should be better (it's a light theme). Additional please consider to add Yourself to Readme in Thanks section :)

[Gingeh]

I've made those changes now :)

[elkrien]

Thx, I have modified version and merged.