You can buy antibacterial trade paint and have it mixed to match any colour you like. So you can have antibac walls that look warm and non-institutional.
There’s some evidence for this paint, which is essentially impregnated with silver ions being helpful as part of a system of infection control. The evidence is not fully agreed upon, and there may be costs as well as benefits. It’s also quite expensive, but the trick is you can have it mixed to match your walls and then just paint around the contact points/ cross infection points, like around light switches and at hand height on door frames.