I like your coloring suggestion. I also recommend spending some time each month in your shop just "visiting" with your tools. I do this by opening each toolbox drawer and cabinet as a way to remember what I own, labeling all the wooden boxes on the shelves both on the side and top for its contents, and consistently putting the tools back in the same location after use. It is very frustrating wasting time looking for a tool you know you have but can't find it. The same is true about not using the right tool for the job because you forgot you already owned the tool.