Where in the pick slip code can it be altered so that itll print in colours as it defults [...]

Cal H

Pick Slip Code, Print in Colour

Erik Merkley

That will definitely be something related to your browser or printer rather than Neto. Are you using Chrome? Some printers ignore the chrome print settings and need to be set to colour directly in their driver. Try clicking "Use system print dialog" and setting it to colour in there.