The okey is the joker tile that can stand in for any tile you need to complete a run or set.

It is defined by the indicator: the okey is the tile one number above the indicator, in the same colour. Because there are two copies of every tile, two okey jokers are in play each hand. The okey is extremely valuable, so most players hold on to it rather than discard it. Finishing your hand on the okey is worth double, which makes timing and patience important when you decide how to use it.