To enable colored profiler results, go into the NetBeans "Preferences"->"Java"->"Profiler" menu, as seen in Figure 1. Check the box to "Use defined filters for coloring results".
Figure 1: NetBeans Profiler Colored Filter Results
Add any filter(s) you wish, and assign a color to the results of those filters (Figure 2). If you wish to display the output from one of the existing filters in a different color, click the tool icon and change the colors. As you can see in the previous figure, I updated the Java EE Frameworks filter to be a green color.
Figure 2: Assign Colors to Filters
After applying the colors to the filters, run the profiler and see the results!
Figure 3: Colored Results!