We used to be able to buy silk in colors, and going WAY BACK to the late fifties, we could buy silk scarves in any color and they worked fine. But if you want colors now I think you will have to dye it as I did. Rit dye, mix in a bucket of hot water, dip the silk in it, then drape it off the edge of a table or bench to let it drain and dry and you will be good to go. It didn't seem to affect its ability to shrink once applied to the airframe.

Clair