The Harmony card, Needs family, yin polarity, evokes a need for accord, like strings tuned just right. It signals the importance of bringing several elements into agreement rather than forcing just one. This card invites you to seek adjustment rather than a compromise you simply endure.
In Oradia's mirror-card system, Harmony answers to Stimulation: the two don't oppose each other, they answer each other, like two sides of the same movement.
This page gives the card's general meaning. In a real draw, the Harmony card is always read in relation to the other cards drawn and the intention set at the start — it's that combined reading, unique to each draw, that the online oracle develops.