Years ago when I lived in Marietta, GA, I used to shop for art supplies at Pearl, very well known on the east coast....Unfortunately after many years, they closed, but in the interim, it provided many happy hours for finding new things to experiment with. I was into dyeing fabric so anything with the word "cotton" caught my attention.
I mixed up some textile paint to make a brownish gray which I thought would work well on the background fabric.
I found when our house was being built (top left) used as a base for tiles in the bathroom. It creates a wonderful and subtle effect on fabric....just a touch here and there.
Even little fabric dots can be added to the tulle.....Now it is so easy to move the applique anywhere on the quilt to see the best placement for it. The tulle on the lower pictures is very light colored and hard to see....
Have fun...til next time.