When there is a difference between the color density of the image used in the designing process and the image used in the application, it may still appear similarly on screen, but may still appear different after printing.  Please be careful when you design an object that matches the color of the background image.

When there are two different shade of blacks, such as rich black and solid black (K=100%), they may appear more similar on screen than their CMYK numbers are. 

Confirm that similar colors have equal CMYK numbers to prevent this issue.