Different bright colors is also a great way to tell between different sized tools like a set of Allen keys and wrenches from a glance and associate a size to a particular color instead of looking for markings on the tool. I go out of my way to get colored sets now
Better tip is simply to use bright colors. Mostly I will see my keys anyway if I look at the directly.
Different bright colors is also a great way to tell between different sized tools like a set of Allen keys and wrenches from a glance and associate a size to a particular color instead of looking for markings on the tool. I go out of my way to get colored sets now