In three adjoining rooms there is different pattern Italian-style ceramic tile. Can floor tile be painted to match that will hold up to traffic and cleaning?
It is not wise to paint tile ever because most likely you will have paint chipping and possible falls. I used to lay tile for a living and we even recommend not sealing your grout because it is very difficult to change the color. Best bet would be to have it all torn up and replaced with tile that you are happy with.