Thanks for the tip, i do indeed, i've somehow ended up with matching Lightening white CAAD and Capo frames and think the black carbon fork on my CAAD would look much nicer in a matching white as per the Capo (tried the Capo fork on the CAAD and it looked really nice IMO).
Have you got something painted in this colour already?
Various automotive paint shops will digitally scan a painted object for a small fee and match and supply the paint for you.
I used http://www.spccoatings.co.uk/ in Park Royal, i got a 98% match to a frame colour that cross referenced to a Mercedes colour