Currently, you can adjust the color of the outline on the folder icons, but you can only do one at a time. Personally, I have a couple hundred folders and prefer to have them color coded. The only way to do this is to go through and select each folder one at a time, which is extremely time consuming and tedious. I think an amazing addition would be the option to select multiple folders and adjust the color for all of them together. This would personally save me hours.