Using Xcode 4.3.2 I am unable to add color values by rgb. The standard picker looks like this 
Which does not offer any input for rgb or have any sliders allowing me to set anything else.
The custom picker at this location http://www.panic.com/~wade/picker/ instructs me to install at
/home/Library/ColorPickers.
However home is not editable. So I placed it into
/Users/username/Library/ColorPickers
which does nothing. (Is this correct?) Can anyone explain how to properly install this? Thanks