I painted on an acrylic back ground cut to shape. I just mixed a very dark blue with white try to get a gradient effect - but it doesnt show up at all. The paints are standard acrylic and were applied with a brush. Cannot recall the brand name.Jayse said:What was used for the bluish background?? Love it and am thinking of incorporating this color with my new tank that appears to have been spray painted black on the back. Is it spray paint or something else? If paint what type? I'd like to not get one that reflects back so to speak. Is there a name to the color/ brand as well?