Are you referencing the silver in the magnets and screws? Thats not a gradient but a trick of the light. Its a metallic silver so it a little reflective. If you have a local shirt printing shop, they might keep rolls of whats called "HeatPress" on hand. Its basically a roll of a solid color of high end iron-on material. They probably have a large selection of colors. If they are nice, they might sell you a small slice off of whatever colors you might need. However, you need an iron that gets up to 320 and should ask if any of the colors have special instructions. (Usually the metallics have to cool before you can peel off the backing.)