I am having this debate with a client right now and I wanted to get a temperature check. What are your thoughts?

Should exterior paint color schemes harmonize or even repeat interior choices? For example, if your interior has lots of cool hues should you pick an exterior color that fits with those cool colors (cool grays, whites, blues etc) ?

Or

Should exterior paints be totally separate from the interior colorways and instead coordinate with landscaping? Cool hues on the inside for example, warm yellows, greens and creams on the outside?