D8051: Custom background color

[Nathaniel Graham]

ngraham accepted this revision.
This revision is now accepted and ready to land.

REPOSITORY
  R223 Okular

REVISION DETAIL
  https://phabricator.kde.org/D8051

To: albertfreeman, #okular, aacid, elvisangelaccio, rkflx, ngraham
Cc: aacid, ltoscano, ngraham