HTML span with unknown style variables has black background

[mario.gembox]

Hi Sarah,

Please try again with this bugfix:
https://www.gemboxsoftware.com/document/nightlybuilds/GBD35v1408.zip

Or this NuGet package:
Install-Package GemBox.Document -Version 35.0.1408-hotfix

Does this solve your issue?

Regards,
Mario