I’ve bought a 10232 set recently online (not official store, some Amazon seller). The box and all packs were properly sealed, but I see some bricks have the same color (grey), but different shades. I even see two similar bricks of the same color but different shades. Has the seller tricked me?
10232 was released long after the switch from old grey to new grey, so that's a bit unlikely.
The photos are not very good for seeing color differences on, but I see nothing of notice. I've seen far bigger variations within what LEGO deems acceptable. Fans generally have higher standards for colour matching than LEGO, I knew a fellow fan who had sorted his yellow bricks in 6 different shades.