Saundra, they'll be fine in a tub but it will need to be a decent size one; the larger the pot the happier the plant. I have a few in the garden in tubs and one huge one that is in the ground - in the ground they can go quite big. If you put them into a tub then they do need feeding with ericaceous feed at least once a year.
And remember the blue vs pink depends on the acidity of the soil. Apparently if you put copper coins into the soil it'll keep the plant blue. I've never tried it though