I have had to use plain acrylic paint as I was unable to find fabric medium locally. The paint adhered poorly to the plain purple fabric so I added machine embroidery to make it more complex. On one sample the purple paint is so dense against the yellow that the fabric is obscured. I tried to embroider that but it was too difficult through the paint. On the other purple fabric the yellow paint looks green in the photo but is clearly yellow in real life.