I have a colour problem that I need help with ...?

I am part of a committee hosting a very important event in August. The venue has these huge Maroon Stage Curtains - but our colour scheme is blue, silver and black.

The committee doesn't want these big maroon curtains making our decore tacky and out of place - so we figured we could create an illusion by either lighting or attaching wall of fabric in front of the curtains to "change" the colour.

So what colours would I need to put on the Curtains to change the Maroon into either a blue or black????

NOTE: The venue isn't willing to take down the maroon curtains for us to put up ones that match our colour scheme - so we have to either use fabric or lights to "change" the colour of the curtains