color dynamicly a menu pgn image

[krarinkas]

I am using an modern menu style that includes in the left and right sides 2 png images which gives an 3d look and feel to the menu.As i want to make my site style customisable i need those images also to change their color based on clients desire of color.My problem is i have no ideea how to acomplish this.I found something that shows with an smiley the thing i mean but in my case its not a css created smiley but an png image ( http://lab.artlung.com/css3-smiley/ )Thank you.