Can anyone explain how this court lines coloring works? I am trying to get a yellow/gold color, but it seemsI got stuck with black.
Nevermind, i think I got it.
For others (since the OP says he's figured it out), the lines on the template really aren't needed in the image you create. In fact, I suspect it is better not to have them. Lines are added on top of the image file provided and you set the colors for the lines on the same page where you provide the link to your file.
Having the lines on the template helps in designing the court so you know where they will appear and what they will be going over the top of, but that is about it. I went ahead and created a template with only the lines showing and a transparent background which I could lay over the courts I was trying to design. If anyone would like it, here it is:
I didn't worry too much about getting the lines perfectly smoothed, as they are just a rough guide. That layer will be deleted before saving the image file to be uploaded.