Get Color Sidebar Icons Back in Mac OS finder Window Suppose I want to come back to Color sidebar icon for Finder. For Lion I followed these instructions, but seems not working anymore (SIMBL is not working with Sierra): 

http://osxdaily.com/2011/08/25/get-color-sidebar-icons-back-in-mac-os-x-10-7-lion-finder-windows/

So, do you know if there is a way to change from this fantastic soviet union gray sidebar to one with color? 

thanks,
Andrea
Use mySIMBL* instead, SIMBL has been non-functional since apple implemented System Integrity Protection. Once you've set up mySIMBL install the package at:

Sources >>> Wolf's tweaks >>> colorfulSidebar9.

Then restart Finder and you should have colored sidebar icons again.

* I am the developer of mySIMBL and colorfulSidebar9