This is a minor issue, but it's really annoying. As you probably know, Windows 10 had multiple background setting options for how you want a picture to be fit. Fill, fit, stretch, tile, center, and span. Since my phone has a 4:3 aspect ratio, and I don't want my images to be distorted, I chose fit. It just displays the entire image on the screen. The borders that fill the remaining space is red, which is really annoying. Attached are images. Does anyone know how to change this color? Thanks.