Welcome to the Forum, Kaci:
No, the countertops nor the tile has to be the same all through the house. It is perfectly acceptable to use materials and colors of your choice. I often watch the TV show Flip That House, and I haven't seen one of them match all.
To me, it would look like you got a "fire sale" price on them and had to use them up. Go with your best judgement and intuition.