I have a Lexmark x5470 & I get an error unsupported cartridge
Ink cartriges have chips in them, if the printer does so many prints without getting the "I've had a new Original Cart fitted" it will stop untill,you give it one, regardless if there ink or not
Im afraid it doesn't care that you only need to use the colour cartridge, it is designed to cost you money and make money for lexmark not refillers.
Welcome to our modern world, manufactures make the ink hard to recycle by incorperation of expensive chips that makes refillers, unable to make a easy dollar, because if that want to make cartridges that work they must also fit the expensive chip.
All empty cartridges have a little ink left in them because getting air in ink lines is not a thing we want.