first stage of getting rid of ColorData

Change-Id: I5e4e95eb958722814c43c8d1ebfef17ad18c29ec
Reviewed-on: https://gerrit.libreoffice.org/49997Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
Tested-by: Noel Grandin <noel.grandin@collabora.co.uk>