Method for ensuring that coating compositions have the correct colour

method suitable for use in warehouses wholesale or retail stores detail that: a) a can containing base paint is placed on weighing means (3), b) dyes are distributed simultaneously to the can (1) and then c) a load, usually the combined weight of the can and its contents, in the weighing means (3), wherein d) the load is compared with data from a database, is determined to be each data a proper load for a particular color for the coating composition, e) the absence of correspondence between the load and a datum in the database and optionally f) whether the absence of correspondence is detected is detected, an alarm sounds or They rejected the can and its contents.