Hi Paul, I tried those two options but couldn’t see any way to change the alpha overlay colour per shape or layer, I only see “Outline Size” and “Fill Opacity” under Color on the roto node?
Possibly a preferences option or view as your said, something like “Match Alpha Colour to Shape Colour” perhaps? So when its active whatever colour your splines are set to is what the alpha colour is set to when pressing Shift A . You don’t always want this active but what I tend to find is I set colors based on required separation and being able to QC that separation directly in Silhouette with the color overlay like I would on an external player such as RV would be suuuuper handy.
You could probably set this up with nodes right but a quick hotkey to enable/disable it was what I would be after.