I'm going to have to shoot Epsilon's theory down here a bit... Darth Vader had a red saber, but he fought green sabered people and Mace Windu's was purple. High Jedi are not walking forces of chaos. Its literally against the rules. Also life sucking force lightening is blue.... so unlesss good equals life sucking now, I think your wrong there.
The colors of aura in MA is emotion based. Red is anger/agression, blackish purple is dark green/purple is depression and bad things, etc... etc.. If I remember correctly Belldandy can see people's emotions as colors on their auras.
In Naruto human chakra is blue (Its just only Naruto realy has enough to waste in fancy light displays) and at least the Kyuubi's is red. Even evil human's are technically blue.
I'm guessing 'purple' as wild magic was something in one fic that rippled from a single story to influence several people that took it as universal cannon for whatever reason. I don't know the specific work (fanfiction or published fiction), but I'm sure you could back track the origin with enough time and people that actually remember where they got/stole the ideas from... but I'm not going to bother with that personally.
As a point of logic... why would wild magic have a solid color to representing it in the first place? It wild magic. I've seen a player in AD&D with a wild mage... when a Neutral Evil charicter manages to become partially possessed by Cthulu (complete with tentecles frowing from their lower back) due to using vampiric touch, end up with lawful good lycanthropy, and then manage to have them randomly set off their lycanthropy at noon midbattle and somehow end up winning the battle for their side (the evil side) when they attempt to fireball their own troops and instead end up randomly shifting forms on a table 3 percentage tables deep each round while in an unstable cyclonic Vortex of energy... then rolling for Taresque (still in the energy Vortex that is moving with her) causing the trees your fighting to run screaming in terror.
Wild magic isn't a solid color to anyone that has seen it... its unstable by definition and that when you try to match it with a color chart it is rather difficult to do so, as the color chart seems to have broken out in a terrible case of firebreathing goat eyes.
Also, Good and Evil are on a different axis of the chart then Chaos and Order... of course Chaos is a 'higher spectrum' component then Good... Good and Evil actually require someone/something around to make judgement calls on where on the scale they made up their marks for Good/Evil actually fall... they are also subjective forces. Chaos and Order happen when no one/nothing is around to make the judgement calls. Any scale that doesn't have Order/Chaos on more primal level than Evil/Good is probably going to be created by a group that has catch phrases and one-liners for why it can get away with what it just did.
The colors of aura in MA is emotion based. Red is anger/agression, blackish purple is dark green/purple is depression and bad things, etc... etc.. If I remember correctly Belldandy can see people's emotions as colors on their auras.
In Naruto human chakra is blue (Its just only Naruto realy has enough to waste in fancy light displays) and at least the Kyuubi's is red. Even evil human's are technically blue.
I'm guessing 'purple' as wild magic was something in one fic that rippled from a single story to influence several people that took it as universal cannon for whatever reason. I don't know the specific work (fanfiction or published fiction), but I'm sure you could back track the origin with enough time and people that actually remember where they got/stole the ideas from... but I'm not going to bother with that personally.
As a point of logic... why would wild magic have a solid color to representing it in the first place? It wild magic. I've seen a player in AD&D with a wild mage... when a Neutral Evil charicter manages to become partially possessed by Cthulu (complete with tentecles frowing from their lower back) due to using vampiric touch, end up with lawful good lycanthropy, and then manage to have them randomly set off their lycanthropy at noon midbattle and somehow end up winning the battle for their side (the evil side) when they attempt to fireball their own troops and instead end up randomly shifting forms on a table 3 percentage tables deep each round while in an unstable cyclonic Vortex of energy... then rolling for Taresque (still in the energy Vortex that is moving with her) causing the trees your fighting to run screaming in terror.
Wild magic isn't a solid color to anyone that has seen it... its unstable by definition and that when you try to match it with a color chart it is rather difficult to do so, as the color chart seems to have broken out in a terrible case of firebreathing goat eyes.
Also, Good and Evil are on a different axis of the chart then Chaos and Order... of course Chaos is a 'higher spectrum' component then Good... Good and Evil actually require someone/something around to make judgement calls on where on the scale they made up their marks for Good/Evil actually fall... they are also subjective forces. Chaos and Order happen when no one/nothing is around to make the judgement calls. Any scale that doesn't have Order/Chaos on more primal level than Evil/Good is probably going to be created by a group that has catch phrases and one-liners for why it can get away with what it just did.