Sulky Rayon Colour Chart - with actual threadSulky Rayon Colour Chart A REAL thread chart for our RAYON thread line. Only actual thread can tell you the exact colour. This thread chart is an invaluable tool to help you choose the right colour, or sometimes, the NEXT right colour if you don't have the perfect colour in your stash. It can save you hours of frustration when doing computerized embroidery.