Hi Daniel,
sorry, no I was wrong. I did not mind that you were posting in the Teststand thread and thought you were talking of LabVIEW. That is why my answer has only to do with LabVIEW; forget about it.
If you are using Teststand to create reports, the graphs will be generated by Teststand, not LabVIEW. Unfortunately, the graph colors are not an option which can be easily changed. Instead, this is rather complicated and implies Testsatand customisation. Please refer to this thread to get some more information about this issue:
how change the report graph color in teststand.
Ingo Schumacher
Systems Engineering Manager CEERNational Instruments Germany