I was thinking just the opposite, I'd rather see predominantly silver mirror with copper and gold accents. I think that would make the saber "pop" while on the stand rather than blending in :).
while im not in this run i totally agree with lumi here, too much color in the stand will not make a nice contrast,
i would keep it as simple as possible, like another poster wrote you dont want to loose the saber in the stand, a simple mirrored bottom to reflect the saber would be a nice color contrast on its own, and maby bronze/gold accents here and here
the stand should never distract you from the display of the saber itself.... master replicas nailed it with their stands