Is gray webbing normal?

[Ducksarecool42]

Is it normal for ducks to have orange legs and toes, but grayish webbing? Or is it a sign of illness? Both of my ducks (mallard and khaki campbell) have gray webbing. Sorry for the poor picture quality. I picked up the female recently and didn't see any spots that look like bumblefoot underneath.

 

[cheezenkwackers]

Looks normal to me.

 

[MartinFamilyHomestead]

Looks normal to me as well