I think this is quite interresting.
Most common the dark yellow color that we have all learned to cherrish. Like the 10 y cask str. Laphroaig I'm fondling now.
Then the reds...like the Glendronach (which actually got my wife interrested in whisky). It is said to be matured in sherry casks, hence the color...and the only red I know about.
And then, my new aquintance, Ardbeg. I'm curious about that pale color. Thought at first someone had poured water into it while I was not looking (as I bought it at the airport in Riga (LV) nothing would have amazed me :-) but still so rich in taset. (an Islay of course...)
--shelby (not fully matured myself :-)