colors.m

- (void)colors {
    // Working with colors in Cocoa Touch.
    
    // I think almost everyone uses RGB decimal, which is the worst of the ways. You don't have easy control of
    // brightness, and you've got decimal points in your code that don't map to the way you think of RGB.
    UIColor *rgbDec = [UIColor colorWithRed:0.484 green:0.745 blue:0.191 alpha:1.000];
    
    // If you're working from 0-255, why not just code that?
    UIColor *rgbFrac = [UIColor colorWithRed:123.0/255.0 green:190.0/255.0 blue:49.0/255.0 alpha:1.000];

    // You could do this with a category, too.
    UIColor *rgbCustom = [UIColor colorWithRedLevel:123 green:190 blue:49 alpha:1.000];

    // A better way is to work with HSB, where you can easily tweak saturation and brightness without affecting hue.
    UIColor *hsbDec = [UIColor colorWithHue:0.238 saturation:0.682 brightness:0.776 alpha:1.000];
    
    // Still better is to work with HSB in fractions.
    UIColor *hsbFrac = [UIColor colorWithHue:86.0/360.0 saturation:174.0/255.0 brightness:199.0/255.0f alpha:1.000];

    // And, again, you could create your own category
    UIColor *hsbCustom = [UIColor colorWithHueInDegrees:86 saturation:174 brightness:199 alpha:1.000];
}