Problem: The visibility icon of protected methods is a filled romb. However, the fill-color is a yellow that is difficult to distinguish from the class-box background color. On my monitor the icon appears to consist of the edges only.
Experiment: Adding these two skinparam statements gives the result I'm looking for
skinparam IconProtectedColor DarkGoldenRod
skinparam IconProtectedBackgroundColor DarkGoldenRod
Is there a method to read the default values of skin-parameters?
Proposal: Wouldn't it be a good idea to let the default color of edges and face of the visibility icon of protected methods be identical?