Which Tigrica breeds come in Sivokrila?

Club breed standards describe Sivokrila for the Tigrica.

Tigrica pattern

Sivokrila

Budgie mutation: gray wing markings instead of black, the body color diluted by about half.

2 Tigrica breeds list Sivokrila. It is in a club standard for 2 breeds.

Breed	WBO	ABS	COM	BS UK
Tigrica	Prema standardu (“Greywing”)	Prema standardu (“Greywing”)	Prema standardu (“All Greywings of the Green series; All Greywings of the Blue series (inc. Yellowfaces)”)	Prema standardu (“GREYWING”)
TigricaSivokrili	Prema standardu (“Greywing”)	Prema standardu (“Greywing”)	Prema standardu (“All Greywings of the Green series; All Greywings of the Blue series (inc. Yellowfaces)”)	Prema standardu (“GREYWING”)