Flatlaf highlighting of deprecation

FlatLaf dark highlights deprecations in Java source code (e.g.  Byte b =
new Byte(ipaddr[i]);).
I find that too visually similar to the highlighting that is done of all
uses the selected local variable, which I use quite often.
What is the key for FlatLaf.properties for the deprecation highlighting?
(or for the uses of variable)
Is there any documentation on the keys NetBeans uses in FlatLaf?

Mitch