Muting with Metallic Block Printing

Many of the fabrics I fused on this piece are already block printed, but I feel like the colors are still too strong.  I want the added color squares to be a bit more muted and to coordinate better with the underlying neutral block printed collage of natural fabrics.  Block printing with metallic gold and silver paints seem like the thing to try to achieve that (these are the same metallic paints I used for printing the natural fabric collage two years ago - so this seems like the most sensible choice for pulling this together).