Help integrating colorbox script for blurring fanart

Hey guys, I'm working on a personal project modding the titan skin for Kodi Krypton with DSPlayer.  I'm really wanting to use blurred fanart backgrounds and from what I can gather the colorbox script is what I want/need.  

Since I'm more of a designer than a coder, I'm kinda lost as to how to go about using it.  I basically just want to have my background layered as such:

Fanart (Blurred)
A dark semi transparent overlay

ANY help would be greatly appreciated