Hi Macc.
The way it's set up now, black or white (depending on theme) represents non tonal elements (broad noisy spectrums or transients) and works quite well for that. You can shift the colour spectrum around in the spectral settings window which might get you closer to what you want and if you right click the coloured area in that window, you get options to have the the octaves spread over so many colour bands.
Not quite what you want though.
It might be something that can be opened up upon later on though or in the API.
