Each year I try and make one or two batches of these rainbow rugs. To do it I have to collect enough old flannel sheets in the appropriate colors. I like to have 9 colors, blue, blue-green, green, yellow-green, yellow, orange, red, red-purple and purple. Occasionally I have to dye a white sheet but usually I can find all the colors I need.
I make some of them like the first picture, just using the 9 colors but also like to play around a bit and mix the colors with one solid color. This year I'm using a set of grey flannel sheets that we've used on the bed for a couple of years. The bottom sheet was getting a wee bit thin and it was time for them to go to rugs.
I really like the way the grey and the rainbow colors are working together. I also have a white flannel sheet and I think I'll try one like the one above with white and colors. These always sell well and are fun to make.