Heyho 
I personally find that, all Datastructures need some coloring like in VS200x, because its really better for the eyes to distinguish between code-elements and such.
I would prefer a color-x for buildin-datatypes and color-y for selfcreated, a la records, classes etc…
And actually in general, could you invite a color-picker for all stuff which can be colored generally, like comments, commands, operands, operators, begin/end etc…