FloatRGBColorPicker
What is it?
FloatRGBColorPicker adds system-wide floating point RGB color selection to Mac OS X.
How do I install it?
Unzip the archive and copy the file FloatRGBColorPicker.colorPicker to ~/Library/ColorPickers.
How do I use it?
A floating point color picker panel will be added to the standard Mac OS X color picker. You can copy comma separated floating point colors in RGB or RGBA notation to the clipboard, ready to paste into XCode.