Well, in my infinite boredom, I have converted Citadel Colours into hex codes for the B&C Space Marine Painter (through Photoshop, if anyone's interested), as many of you have been waiting for. The colours were converted from those on the Games Workshop Interactive Painter, so the metallics may look a bit dodgy. Also, given the shaded nature of the model on the B&C painter, some colours may need a bit of tweaking, but this is a start. Foundation Paints aren't included, unfortunately.
To find the colour you want, either hit Ctrl+F on your keyboard and type said colour's name, or find the appropriate section of the spectrum and browse.
So, without further ado...