A white piece of fabric can be so intimidating to work on, that's one of the reasons I like to start with fabric that has a little color and texture when I plan on collaging and painting it.
I like to create a variety of warm and cool browns.
I mix watery solutions of textile paint, this is a great way to use up the remainders of paint left in the jar. One of my favorite colors is made by combining Setacolor's buttercup yellow and purple, it makes a gorgeous warm ochre brown.
I crumple pieces of dry white pfd cotton fabric and dunk it in the paint solution.
After it has dried, I iron the fabric to reveal all the beautiful texture.