My MiLs bedroom and the live in carers room are being repainted this weekend following flood damage. MiL has advanced dementia and is in a home until next week when the rooms are ready again. Dh had assumed we would repaint the walls in pretty much the same neutral colour that they were already, but FiL is insisting on blue. Not any blue, but a bright recycling bin blue. He has dementia too and is prone to bouts of unreasonableness so is unlikely to be moved on this. One room has a strong green carpet and pink/yellow/green curtains and the other room will have a new neutral carpet and has strong green curtains (with a little cream & gold). He won't want to replace the curtains, and even if he did none of the furniture will go with blue either. Frankly, blue is going to look horrid in both rooms, but it's his and MiL's house, so what to do? What annoys dh, is that he's choosing something that will look vile, but it's other people that will have to sleep in the rooms.
Any ideas? Is it unethical to find blue is out of stock tomorrow?