That's a feature I use a lot in Illy but it is hidden away in the Object Panel so many people miss it. Yes when submitting a drawing to client and the client doesn't like your use of colour and you haven't Named the colour it can be a tedious job to go around and sort out your drawing. There again the way Xara uses colour is totally different, "Named Colours" is slightly like the Swatches Panel in AI but you can live and get to use both