I find teslas blue "decent". I had BMWs for almost 20 years previously (3s and later 4s for me, 5s for my wife or more recently an X5 and X3 for her), and a couple of those were blue. I like some of BMWs blues very much, and the tesla blue is only "ok" compared to that.
Tesla only has 5 "colors" and 3 of those are black, white, and grey, so only "colors" in the broadest sense of the word (lol). I dont like red cars, and didnt want to pay extra for white (in 2018, the same white that is free now was a 2500 option).
Purchasing a used tesla is not going to save you very much money (if any at all) right now, so you might want to look at purchasing new, especially if you can wait. If you are planning on wrapping your car with a color change wrap, you also might want to consider getting a black one, then getting it wrapped. Black wont look as "funky" in the creases etc as some of the other colors when wrapped.