Thanks for inquiring Aspose.Slides.
I have worked with the presentation file shared by you and have been able to observe the improper rendering of color inside tables cells. An issue with ID SLIDESJAVA-36374 has been created in our issue tracking system to further investigate and resolve the issue. This thread has been linked with the issue so that you may be automatically notified once the issue will be fixed.
We are sorry for your inconvenience,
Thank you for the update. Is there an ETA for the fix?
The issue has just been logged and is pending for investigation in issues queue. Our product team shall schedule and investigate the issue for investigation and resolution on its due turn. We will share the feedback with you as soon as it will be shared by our product team and will really appreciate your patience in this regard.