Its funny, speaking to several anodizers, there are only 2 shades available in the HA as far as they know. This one is called "clear" and it comes out dark green. There is also the black you see on lots of stuff out there.
I think the black is cool, but the green ones are my preference.
The stripping process is all dialed in now so other non HA colors are possible too down the line. These scales are worth the effort, but are pretty intense. Lots of strong chemicals, bubbles, gas clouds, fuming nitric acid..... *sniff* reminds me of the good ole days stuck in the lab...
PS. (Terry, the payola check in the mail to ya!!