The color choices for PLA 3D printing plastic have always been plentiful. If there's a shade that you like to print with, there's likely a PLA roll for you. Innovation in this space has been slow for a while, however, until the creation of Quantum PLA by Matterhackers. If you want to take yourto the next level, this filament is a must-have.
Right now, Matterhackers has Quantum PLA on sale with a 20% discount, so each roll is under $30 right now. If you're looking to make some beautiful models that aren't being painted then I suggest picking up a few of the different rolls. My favorite is the green/purple, but there are a lot of different ones to choose from.
Unlike most PLA that only has one color in the strand, Quantum is a dual blend that has two colors split evenly down the middle. This gives a really nice transition effect that you can see on the Joker model from Fotis Mint above. It takes a little bit of work to make sure your model is oriented correctly, but once you get the hang of it, Quantum can produce fantastic results.
Be sure to check out ourif you happen to be looking to upgrade your machine as well.