Blank white screen
Isn't it obvious what that means? It's a minimalist hipster icon meaning "nothing there". It's about as obvious as an icon displaying a sunflower for a photo gallery app[1]. Or pretty much any other fecking[2] app (ie most of them) where the icon is not related in any way to the function of the app that's liable to change into a totally fecking different icon with any or all new updates.
[1] For "app", read any fecking GUI based system of relatively recent vintage.
[2] Finally got around to adding "fecking" to the spelling dictionary. I'm using it too much nowadays. I'm turning into Victor Meldrew! (not that he said fecking, ever, but you get the point.)