Looking for a plumber to come fix our ailing boiler (why do they go wrong in the middle of winter?), we came across a series of web sites designed by a company called Blue Halo, who seem to specialise in web presences for small businesses.
"But why call themselves Blue Halo?" asked marypcb.
"Sure", I said, looking at the images* on one of their sites, and thinking of the early days of the web. "It's obviously the gas ring..."