I use bubble hash hempkat. I don't like smoking bubble and I have always disliked the essence of edibles made with leaves/green....
The thing is that I used dried bubble hash the crystals won't break down so you still get little brown specs in the butter. I only make chocolate so doesn't matter to me, oil may be the better way to go like Lazyman said. To me its a night and day difference on high, much more focused....
Well the color of the butter itself isn't much of an issue but when it's very green it usually has a very "green" taste to it. The taste is what I want to get away from.