my cousins day gecko escaped from it's tank yesterday and was running one the walls and ceiling then it jumped onto me so I tried to grab it and its tail just practically fell off, I know they loose their tails for defence but my question is will it fully grow back and if it does will it be the same colour as the rest of it's body?
It should grow back, although it will most likely not look normal. But the other advice he gave is right on.