Could also be used as an identifier for other officers in case they get into an altercation and need to signal “hey I’m on your side”.
I am not sure if they were being coy, but I saw another user say “color of the day” meaning that it might not just be blue, and that they could be cycling colors to obfuscate detection from protest groups on multi day protests.
All roads lead to Microsoft 😬
“Both first and business class seats were equipped with a Windows NT 4.0 based In-Flight Entertainment Network (IFEN) system with touchscreen in-seat video displays and magnetic card readers.[3] In the galley, a cabin file server served as a central hub for managing content, which facilitated movie downloads, stored flight and casino information, and collected credit card data transmitted from each seat.[3]: 43 “