First Photoshop "Work"

Browsing around some daily  forums I view I spotted a person asking for help with Photoshop in which I decided to help him.
His main problem was turning the background of this:

Into "a lighter blue" and below is my result:

How:

I managed to get the background blue by using the colorizing technique and from that I polished the image up by removing any excess blue areas on the main picture (the amphora).

Proof:

Incase anyone wants to see the link of the forum you can find the URL here.