How do I paint amber colored window glass?

The entry door on our house (on the home when we bought it) is a very sturdy door, well made door, but very ugly. The top half has a diamond grid with amber glass. I am going to paint the door red and I want to cover the amber colored glass. Yes, replacing the glass is probably my preference, but there are so many other projects that are a much higher priority right now and that isn't going to happen at this point. I did get a can of frosted "stained glass" spray paint, but I have a feeling it won't cover the color up. What to do to cover the amber color??