"Total harmony" refers to a state or situation where everything is in perfect agreement, balance, and peaceful coexistence. It means that all parts or elements are working together smoothly, without conflict or discord. Full definition
This white high neck sweat shirt is in total harmony with a plum coat and loose pants well matched with white sneakers. (outfittrends.com)
As I said earlier, it takes lots of time & patience, but it is possible for them to live together in peace (if not total harmony). (pethelpful.com)
Its gameplay, storytelling, amazingly beautiful pixel art, and compelling soundtrack work in total harmony to present an utterly satisfying and unique indie game. (metacritic.com)