Way to distinguish OLL13, OLL14, OLL15, and OLL16

There is a block at the side of recess of Knight Moves shape. And in the horizontal center line position, URB or UFL is colored-> OLL13

All are same as above, except that ULB or UFR is colored-> OLL14

There is a colored edge at the side of recess of Knight Moves shape. And in the horizontal center line position, URB or UFL is colored-> OLL16

All are same as above, except that ULB or UFR is colored-> OLL15