The two blank tiles in Okey are false jokers that stand in for the tile shown by the indicator.

They carry no printed number, so during a hand they take on the identity of the indicated tile and can be used in runs or sets as that piece. For example, if the indicator is a black 9, each blank plays as a black 9. These blanks are separate from the true okey joker, which is the tile one number above the indicator. Together they add flexibility to how hands can be built.