A few tweaks and a conversation with Caer later, may I present to you.........
"Les couleurs de thingymabob"
http://www.mikefranklin.me.uk/experiments/color/color2.html
Interesting! I usually use this to work out colour schemes:
http://www.wellstyled.com/tools/colorscheme2/index-en.html
But yours has an interesting (and more detailed) take on it. Bravo.
On a side note, I decided to go ahead and release it after a bit of tidyup work..
http://www.madebypi.co.uk/labs/colorutils/
:)