Strangely, I do that too. I tend to blame my education :)
Amusingly enough, (though not strange, if you consider its origins) Haskell uses the British spelling. Off the top of my head, the colour types are defined in the Data.Colour module.
I don't know if this is the one you meant, but I watched it a while ago and I think it's well worth the time: SPJ is great to listen to and you actually pick up a good amount Haskell and functional concepts.
Amusingly enough, (though not strange, if you consider its origins) Haskell uses the British spelling. Off the top of my head, the colour types are defined in the Data.Colour module.