Property values might actually take a hit from colors that are too wild. Buyers can be turned off by a house that looks really out of place on the block. Keeping resale in mind is a good idea, even if the current owner loves the color.
What's the line between personal taste and hurting your home's value? I saw a bright purple house sit on the market for months because it scared people off. It makes you wonder if some colors are just too big of a risk.