Last time around, I discussed white's traits that give it a propensity to do certain good and evil things, starting off with this introduction:
A Magic character's color alignment doesn't imply a moral judgment on them. Every color of Magic has more or less equal capacity for good and evil - the difference is in what values each of their outlooks emphasize, and what virtues and flaws they each have. Now, since just about every trait can be assigned to one or more colors (that's the point of Magic's color philosophies, after all), saying a color does evil in certain ways and good in others is a gross generalization.
With that in mind, I'll be continuing on with one of the colors that probably cares the least about "good and evil": Blue. It likely acquired its neutral reputation as an allied color of both white (which is "good" stereotypically) and black (which is "evil"). But as we'll see, blue can be either, both, and neither.
Blue's good qualities: Blue is smart. It is the color of curiosity and acquiring knowledge, and when those discoveries are used for the benefit of the world, then, well, blue is good. Blue is the color of cancer researchers and biologists working to preserve a diversity of species, of fearless explorers who chart unknown regions. Blue is the color least affected by emotion, and so it's easy for blue to have noble, altruistic, and utilitarian goals, unhampered by personal feelings and selfishness. Blue is the color of the intrepid journalist, willing to speak truth to power. Blue supports absolute freedom of information, and censorship is anathema to it in certain conceptions. This quote by Thomas Jefferson describes the mission statement of a good-aligned blue character:
"I was bold in the pursuit of knowledge, never fearing to follow truth and reason to whatever results they led, and bearding every authority which stood in their way."
Blue's evil qualities: Blue's lack of negative emotion can also be a lack of positive emotion - blue has a hard time feeling empathy. Blue's belief in knowledge as the highest goal can allow it to do amoral or sometimes immoral things. A scientist who cares nothing for the suffering of his subjects as long as it provides him with usable research is blue. Like the sea, blue can be overly mercurial, and have a hard time committing to a cause. It can be manipulative for manipulation's own sake. Blue likes to play politics and can create strife and spread misinformation just as well as true information if it suits its purposes. As the very blue and often villainous spymaster Varys says in George R.R. Martin's "A Song of Ice and Fire" novel, "A Clash of Kings":
"The storms come and go, the waves crash overhead, the big fish eat the little fish, and I keep on paddling."