Hello K.,
If I uses rectangles with sub rectangles then a different font style (bold) and stereotype color is used.
Do I have to use additional skinparams? (rectangle with sub rectangle: stereotype should be white and text not bold)
Yes, for that, you must add this additional skinparam:
skinparam package<<container>> {
StereotypeFontColor #FFFFFF
FontStyle plain
}
Because in skinparams speaking, if a rectangle is nested, it becomes a package! (heritage of class diagram)
Here is the expected result:
[See on PlantUML online server]
Enjoy,
If that can help,
Regards,
Th.