If you have buttons on your printer, you can easily access the colour changing preferences, your functions on the printer is definitely set as: black & white - copy, kindly change it to: Colour - copy.
There are other two similar ways you can get this to work:
-- hit the windows logo key on your keyboard and type 'Printer'
-- right click your printer and select preferences-advanced
-- in the colour section, uncheck 'Print Colours as Black and White'
-- Apply, Hit Ok.
-- by simply going to HP solution centre,
-- you can change the output to colour.
That's it, try all these steps and let me know how it all works out.