Getting ready to print color change ABS on my @Printrbot Metal Simple with the heated bed upgrade!!! First will be “Fidget” ring that I designed in green to yellow color change. 
Mr Spano Jr, thank you very much. We really enjoy your Fidget Ring design. Can’t make enough of those 
Be sure to update us with your color-change attempt. Which filament will you use?
I bought it from Amazon. It’s Jet ABS. I can’t find it on Amazon anymore but here is the site of the company I bought it from.
Oh man, oh man, oh man!! That purple-to-pink looks great! What did you pay for your spools (if you don’t mind me asking)? Their per-pallet costs are $12-15 @ 324 spools/pallet.
I believe I spent about $30 before shipping which I thought was a good price compared to what I was paying for regular PLA from Makerbot. 
Man! I wish Google would just add the ability to add photos in a comment. I’ll see if I can share an album of a couple of prints I did with the color change I have. Printed the spinner for the fidget ring, a Cute Octo and the nut on my double ended bolt fidget project. Stay tuned.
PS - Moved on to Fire Red NinjaFlex. OMG I must have more of this stuff right now!