FileMaker 12 Post-Conversion Colors Missing

Just completed a conversion of a calendar from FileMaker 11 to FileMaker 12, and all colors were missing, not only from the calendar entries that were color coded, but also from the color selector.
Any ideas as to what might be done to fix this, either post- or pre-conversion?
Any ideas as to what might be done to fix this, either post- or pre-conversion?