Red/pink hue and apps open by themselves?

So I just realized that my Galaxy S7's clock on the lock screen has this red/pink color to it. And it's only the clock and the text beneath it, nothing else as is apparent from the fact that the things at the top edge of the screen are their normal color. Why is this happening? Another thing that has been happening is I'll only have one app open and when I press the button to swipe away from the app I'm on another one will pop up along with the one I was one. For example, I was on YouTube and was about to swipe off and my phone was up, then I opened YouTube back again and went to close and then it was my clock, and after that it was my video player. Has anyone had these problems before? It's really irritating.