Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!wuarchive!usc!apple!agate!shelby!unix!hplabs!hpl-opus!hpnmdla!hpsad!smithj
From: smithj@hpsad.HP.COM (Jim Smith)
Newsgroups: sci.electronics
Subject: Re: Tri-color LED
Message-ID: <1840036@hpsad.HP.COM>
Date: 19 Feb 91 21:50:44 GMT
References: <13140@hubcap.clemson.edu>
Organization: HP Signal Analysis Division - Rohnert Park, CA
Lines: 7

The only tricolor LEDs that I have seen only use two elements, and you
get the third color by turning on both (or using AC).

I've never seen a BLUE LED.  If the item you're looking for were available, 
you could make a GIGANTIC CGA display!

good luck!