Go to SimiCart website and login to your account. Go to App Builder > Theme. From here you'll see a list of available themes.
Basic Color Options
Advanced Color Options
In this section and you can enter color for: Search box background, Search text, App background, Content, Image border, Line, Price, Special price, Icon, Section, Status Bar Background, Status Bar Text, Loading. Again. You can use Theme Preview on the right side to know how each aspect looks on the app and choose the most suitable colors more easily.