I'm not sure if that was done on purpose or if it's a bug/glitch, but I can't find any information about it in updates and the changelog. The circles that display the building level, which are usually either green, gold, blue, or grey are now entirely white and have been for about a week. Sometimes when my screen is loading, I can see some of the circles have the color they are supposed to, but once the screen loads completely they are all entirely white. If it makes any difference I'm playing on chrome with a Samsung galaxy s5. If it's just a christmas/new years thing then sorry for wasting anyone's time.
Click on the little orange + in your village overview
That should fix it for you, let us know if it doesn’t fix it