right click on desktop then properties click on appearance then on advance at the bottom then in the first drop down menu it is in there click on icon and then the drop down menu below will light up should be able to do what you want there
I right click my desktop...click properties, i click on the appearance tab and then click on the advanced button at the bottom right. Half-way down the dialogue box is a drop down menu...'icon' is in there.
I'm with you now! The colour changing bit is greyed out on mine. I thought it was the actual icon you wanted to change, not the colour of the writing under them. Sorry can't help but someone else will I'm sure.