Some of the earliest colors available to Boro artists were salvaged bits of old TV sets. The Cothode Ray Gun is the basis of the old TV technology and there were color coded boro bars inside that supported the electrodes. (See the U.S. patent for more: http://www.google.com/patents/US4409279)
We called these colors Dwarf colors, ask an old lampworker about "green dwarf" you'll probably get a story.
In this Dab Bulb there are blue borosilicate supports for the scaffolding that holds the whole electrical assembly. It reminded me of this little bit of Boro-Art history... Hence the "Blue Dwarf"
Served up with a side of carb cap.