Color difference between drawRect and Interface Builder?

Simply, I have 2 views in interface builder, one is set to the color 99,99,99 using the RGB sliders in interface builder.

The other view is colored programmatically to achieve a certain shape. I fill it using:

//Obviously, this is in drawRect.
[[UIColor leadColor] set];
CGContextEOFillPath(myContext);

//And this is a category on UIColor
+ (UIColor *)leadColor {
    return [UIColor colorWithWhite:99/255.0 alpha:1.0];
}

The result:

Why does this difference exist??

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EDIT: (unecessary drawRect Code removed)

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EDIT2:

So, here I am lying to myself .. "Interface builder showed RGB 99,99,99 as 80,80,80. I bet it offsets the number by 19." >.> ... A desperate man using Xcode thinks crazy stuff like this .. The result:

PERFECT!!, but why???? Another Xcode bug? I found like 10 of those in the past month ...

I finally reached the fine-tuning stage of this app, and had to solve this issue, so, I searched and easily found the solution:

How do I enter RGB values into Interface Builder?

Illustration: