is the other side of the background fabric lighter? if so you could always turn it over & use it that way- i pay for both sides of my fabric & use the side that fits my needs- sometimes the (muted/lighter) backside is a better choice than the side others would (normally) use...and once it is all done- no one except you knows.
i like it the way it is- but you could also use a (stand out) thread to sew the plates onto the background to make them (pop) out a bit more if you wanted to ...
the plates are wonderful- great use of stash fabrics!