@I ain't Spartacus
This is not the fault of your Estates Department, It's the law!
Some professional suit wearer somewhere decided that it was confusing having 3 different colours - black red and cream for most office and domestic extinguishers. Just think of it as if they wanted to replace the 3 different foot pedals in our cars with just the one!
Should you even have water extinguishers in your area?