To customise the colour scheme for the app you need to make changes in one file only src/utilities/colors.js set the colours that you require in this file it should reflect throughout the app.
Change Icon and Splash image
Expo
With Expo changing the app icon is much easier. You need to replace the icon inside assets/icons.png similarly if you want to change the splash screen you need to replace the image in assets/splash.png with your own image.
Rename App
Expo
Renaming app name is pretty straight forward just replace the name attribute inside package.json
Changing the URL name for publishing with Expo
To change the App name for the Expo url, you just need to rename the slug attribute in app.json file.
