If it was made in the last half of 2002 it would be a 2003 model. Remember that new models are introduced in late summer. I can check again, but I don't think there are any Optimo frames in the 2002 catalog.
I have a print copy of the 2004 catalog, but not the 2003. Some colors may have carried over. The blue that looks closest to your bike is called Patriot Blue. Best pic in the 2004 catalog of Patriot Blue is probably the T800 touring bike. I'll have a look at the 2003 catalog scan and see if another blue looks closer.
I believe what you have is essentially a 2003 Street Headshok, with different color and name for the European market. Streets were only sold in the USA in 2002 and 2003, but there was no Headshok version in 2002. That combined with the Optimo frame seems to place it firmly as a 2003 model.
Color could be Team Blue or Denim Blue, though TB looks too light and DB looks too dark. I guess it's possible that Cannondale painted in other colors for Europe that don't show in the catalog.