Hello.

I am having problems when importing an dwg file to Autocad 2016. This
dwg file is already completed and have been used to generate an pdf file
to print the plan with, but when I open it some of the colors change.

To easy show what I mean I attach a picture showing the difference

Any easy solution for a beginner like me? Please, write your solution for dummies

Many thanks in advance.

 
Hello SuperJonas, check your print configuration and mainly the .CTB applied.