You can only choose between black and white for the text. See Semen's example here:
I tried to replace XCode 10.3 to XCode 11. No problems with compilation, an app even works due to try/catch, but I see error in log:
www.b4x.com
Add one of the two options to your #Region Project Attributes:
' White text color
#PlistExtra : <key>UIUserInterfaceStyle</key><string>Dark</string>
' Black text color
#PlistExtra : <key>UIUserInterfaceStyle</key><string>Light</string>