它是特定于语言的。
您必须转到语法>更改语言并修改Mark Ocurrency颜色。

了解更多：
如何在NetBeans IDE中更改高亮变量颜色？

When I move over a class name all the other places that that class name shows up are highlighted. When I hover over a variable it does the same thing with different places that I have used that variable. I cannot find where to change that setting in Netbeans.

I changed everything else, but even when I looked under every option in the highlighting section there were none with the same shade of yellow that is seen here:

There was also nothing in the Syntax or Annotations section that had that shade of yellow. Is this even a setting that I have control of?

I have Netbeans 7.2.1 if anyone needs to know.

It is Language-specific. You have to go to Syntax > Change a Language and modify the "Mark Ocurrency" color.

Know more: How to change the highlight variable color in NetBeans IDE ?