pity it's a grey theme,
As always, you can change the colors :-)
Actually, the gradient stuff is really flexible. While you can specify RGB values for start and end, you can also define Pen numbers, which means that if you e.g. change pen 3 (the light blue) to something else, the whole gradient will adjust. That makes it easier to change appearance quickly.
Also, what is not shown in the shots is that you can impose the gradients onto a texture, that is you could have a gradient covering the metal texture like the one in the background.