React Navigation switching background colors and styling StackNavigator

I’m fairly new to React Native, but I have a simple working app with three scenes. I was previously using Navigator but it felt laggy and was excited to try out React Navigation (as in After implementing React Navigation, my background color switched from white to grey, and what was grey to white. This is a strange and shouldn’t be related. However I didn’t change my styles. I only implemented the new navigation and the colors changed. When I revert back to Navigator my colors return. I’m using StackNavigator. Has anyone else encountered this strange phenomenon?