i like using a web site that helps you to decide what color to use like /www.sherwin-williams.com/do_it_yourself/paint_colors/visualizer/ its for real houses but it dose work in a pinch
you can use hot glue but you will better results using arleene s tacky glue some people use both using the hot glue to hold while the tacky glue hardens like to tack in places not the whole seam