The blue is just the protective film over the top of the vinyl. It's what you pull off once you have the vinyl adhered to the hood and have smoothed out the bubbles. You'll see yellow paint through the areas that are just the blue. If you put it on your velocity yellow, you'll have velocity yellow showing through the blue areas. I hope that makes sense.What's with the blue? I have a velocity yellow and would be interested where can I get one?