How can I duplicate the default iOS 7 blue color?

There's a similar post on StackOverflow that shows how to do this in Objective-C. The post shows that Red:0, Green:122, Blue:255 will render the same default blue color you see in so many iOS 7 screens. I'm not seeing the same thing when I perform this:

UIColor.FromRGB (0f, 122f, 255f);

Instead, I get a bright pale blue that's not at all the iOS 7 blue. Can anyone think of what I'm doing wrong offhand? Thanks in advance!

-Anthony