I have an all-black background for a smartphone app. The hamburger menu image disappears since its bars seem to be black on transparent background. I need an image with white bars. Does anyone know where the hamburger menu image is located - png, gif or whatever? Or is the colour of the hamburger menu customisable? The onloy work around is to do my own thing with a hamburger button which brings up my oiwn menu page...

Thanks in advance

Paul