get Main Toolbar Colors
fun getMainToolbarColors(backgroundColor: Color = MaterialTheme.colorScheme.surfaceContainer, textColor: Color = MaterialTheme.colorScheme.onBackground, popupBackgroundColor: Color = MaterialTheme.colorScheme.surfaceContainer, titleTextColor: Color = MaterialTheme.colorScheme.onBackground): MainToolbarColors
Below are all the default values from MaterialTheme for compose elements.