Uicolor used up the pits

We typically use uicolor RGB to generate colors:

[Uicolor colorwithred:220/255 green:220/255 blue:220/255 alpha:1.0];//This generated color is black, not what we want

Here are a few ways to do this:

_pushbtn.backgroundcolor = [Uicolor colorwithred:220/255.f green:220/255.f blue:220/255.f alpha:1.0];

_pushbtn.backgroundcolor = [Uicolor colorwithred:220.0/255 green:220.0/255 blue:220.0/255 alpha:1.0];

_pushbtn.backgroundcolor = [Uicolor colorwithred:220.f/255 green:220.f/255 blue:220.f/255 alpha:1.0];

Uicolor used up the pits