I have pairs regularly breeding that don't "sleep" in the same location, way too many variables to make predictions on the specific situation. Tank size, anemone or not, flow, maturity, actual species("onyx" and "picasso" are frequently marked incorrectly), etc., just to start the list of questions.
fwiw: "color" pattern is a lesser qualifier for a mate, than courting behavior. Don't forget the SI/PNG A. perculas are naturally occuring, along with quite a few wild hybrids, and they do not look like the species holotypes at all.