Running Windows Store app crashes with System.FormatException

I’ve built my Unity game for Windows universal app, but when it launches on device - it throws runtime error:
Exception thrown: ‘System.FormatException’ in mscorlib.ni.dll

Here is a screenshot of the problem which is thrown from MainPage.xaml.cs → GetSplashBackgroundColor

The manifest variable has value of: “#222C37

Workaround: Edit the AppxManifest.xml from the exported Unity Windows WUA project and from splash screen row, delete:

BackgroundColor=“#222C37