This is a minor thing just something that created a bit of confusion. I thought there was a purpose to the blue vs green.... Maybe Guild help level or something? But when I noticed it was blue I decided to fiddle around with it to see what the difference was between the color... All i did was click on content and back out again and it turned to green...
I have two upgrades running and both are blue. When I clicked on "Content" and turned one green - the other stayed blue.
I'm not sure how to replicate the blue because earlier it was green. I am on STEAM ver. of PC in both screen shots attached. But I am unsure if this appears on other devices or not.
I do have the iOS version... when I logged on there to check the bar was green on both upgrades... HOWEVER when I relogged back on to STeam again both were green. Because of this I am unsure if this is a PC only visual bug