Different strokes for different folks. The colors help my ADHD brain. I only have to quickly glance at it to know what it is without even reading it as I'm juggling seven different things at once in my head. It does the job of grouping things together, like "these are variables, this is a class, this is a member of an enumerated list, this is a macro" and so on and so forth. And I can quickly get that info from the color alone faster than I can from reading it and trying to remember what is was or trying to drill down where it came from.