2025-07-11 00:00:00 "RHS JHS Color Converter" is an app that "searches for a JHS color code from the code of the RHS colour chart" or "searches for a RHS colour code from the code of the JHS color chart". * RHS colour chart : the fourth edition of the Royal Horticultural Society's Colour Chart * JHS color chart : the second edition of the Japanese horticultural plant standard color chart