But nobody is more turned off. You have 3 people all disliking boring grey, and 2 grey properties for sale, you have more demand than supply and price rises

Build something pink and now you only have 1 person liking it and 2 strongly disliking it, demand now equals supply so price doesn’t rise.

Is it worth the risk?

There’s a reason rented properties are co feed in magnolia, not just because it’s cheaper to get the same paint in bulk, but because if turns off the fewest people, and those it does don’t have any choice anyway as everywhere is magnolia.