Lithium EPUB Reader is a great app on android which reads EPUB files on the go. It is a free to use application and you can download it for free on android. It detects books and EPUB files automatically. You can make highlights and nots from the books.
Themes and Highlight Colors
This app has two beautiful themes which you can select and change the appearance of your app. Sepia and Night theme is the most demanding theme. It also supports dark mode. You can easily select these themes.