Basic Question: Change color of component highlight box?

[sketchydog]

I'm working in someone else's file. Highlight boxes are weird color. How do you set color of group/component highlighting (when selected) box?
Knew I saw it once but cannot find it for the life of me now. Thanks.

[massimo]

[sketchydog]

Massimo
Beautiful! Thanks for the effort and making it so clear!!!

[massimo]

You're welcome.