the direction is pretty clear, just need to know what works and what doesn't. I do think the easiest way to plan adding color to the icon systems is to work in gray scale. This is a very simple, effective system. But I won't know which of these are gonna be in the group till later. I'm pretty sure that one of the most interesting routes could potentially be using a trapezoid background shape in some of the oddly shaped icons and a rectangle for the bilateral ones.