Input string was not in a correct format: rgb(163- 163- 194)

Has anyone seen this error?

Input string was not in a correct format: rgb(163, 163, 194). I get this error when trying to publish my powerpoint presentation. The stack trace includes the following errors:

A first chance exception of type 'ᆿ.ሼ' occurred in Aspose.Slides.dll
A first chance exception of type 'ᇎ.ቋ' occurred in Aspose.Slides.dll
A first chance exception of type 'System.IO.IOException' occurred in mscorlib.dll
A first chance exception of type 'ᇎ.ቋ' occurred in Aspose.Slides.dll

If anyone has any information, it would be much appreciated! Thanks!!