Dave S wrote:

There is a reason for buying extra tile, other than the obvious future
crack or break. You want all the tile, including extras for future
fixes, to be from the same "die lot"....meaning, basically, made in the
same batch. If you try to buy replacement tiles later down the road,
sometimes even only a month later, the colors likely will not match
perfectly, even with the exact same tile, because tilemakers can never
quite duplicate perfectly the "die lot". Batches of the same tile, made
at seperate times, rarely match perfectly, colorwise. You may not
notice this, but I would.

Right! And even in the same lot, shuffle the contents of the boxes.