Use whatever wood you used in the veneers and do something black in it to break it up.
You really could use either one and not be wrong.
If the red matches the veneers, then go with the red...if it's off even a little bit, I would go for the black...
Jason
Now see...I actually like the red...because it matches the veneers and help to 'pop' them, visually. JMHO.