When quilting the bushes - I use deep colored variegated threads (the bushes had been printed in black.). I stitch different colors in clumps until all the bushes are stitched. Deep red, purple,blue, and green threads are used. I also use two threads through a single needle for much of the bush stitching - making it pop.
The background stitching also has a colored thread. A very pastel variegated thread.