I have canon pixma coloured printer after replacing ink tanks iam still getting printouts in green colour?

Answer 1

Have you primed the heads and checked that your magenta ink is functioning?

There should be a test utility which prints from all the heads in turn so you can see if any nozzles or colours aren't working.

A faulty cartridge is not so uncommon. If it is not working, take the cartridge back to the shop for replacement.