Component Customization with Styled-Components Library

First off - great out of box feature for my starting app! The Readme looks like there needs to be more work done to it, and I just want to know if it possible to customize the components?

Following:
1. Disable picture counter on the bottom
2. Color of the nav buttons?
3. Modal background overlay color
and etc

Or was the expectation to directly use pure css customization?