Blue Pen and Black Pen

Just had lunch with someone working at an office 5 minutes away from my office. Someone from my office said he had to refill dozens of forms this morning because his boss told him that all official data must be filled in with blue pen instead of black pen. Our guest from another office was totally shocked when he heard this. He told us that his boss has issued a memorandum to all staff telling them that all official documents must be written and signed by black pen, otherwise the data would be invalid. Nobody at the table could figure out any logical reason for putting so much emphasis on the color of pen people use at work, and how the seemingly absolute standard at each organizations was formed, and why some people at the top at the organization put such a strong emphasis on something considered totally irrelevant in the eyes of others. What a strange little world we all live in.