Red is the only colour that's made.

Here is the piece of Star Wars lore that quietly reframes every lightsaber fight you have ever watched. A kyber crystal is alive, in the loose sense the Force cares about. When a Jedi first meditates with a raw crystal, the crystal responds, and a colour surfaces: blue, green, yellow, more rarely something else. The Jedi does not pick it. They find out what it already was.

Red is the exception. No kyber crystal turns red on its own. A red blade is made by bleeding the crystal, which is exactly as ugly as it sounds: the Sith pours rage and will into the crystal until it stops resisting and gives in. The crystal is not choosing red. It is being overpowered into red. Every red blade in the galaxy is a record of a person deciding that what they wanted mattered more than what the crystal was.

The colour tracks the relationship, not the temperament

This is why the blade colour makes a strange but useful personality reading. It is not measuring whether you are calm or fiery, introverted or loud. Plenty of Jedi were ambitious, competitive, quick to act. Anakin was all three and his blade stayed blue for decades. What the colour tracks is closer to a question about how you hold power over things that cannot push back: a crystal, a process, a person who needs a minute, an institution you outgrew.

Blue and green are the colours of someone who works with what is there. Yellow is duty that expects nothing back. Purple, canonically, is the colour of Mace Windu’s Vaapad, a form that draws on the opponent’s fury and turns it around without being consumed by it, which is a very specific kind of person: someone who can hold an idea they disagree with, use it, and put it down again. The in-universe rarity is the point. It has to be earned from both sides.

White is the interesting one

Ahsoka Tano’s blades are white because she took two red crystals from an Inquisitor, and instead of keeping them or discarding them, she healed them. She sat with crystals that had been bled, that had a stranger’s rage forced into them, and she purged that will out. What came back was not the colour they were born with. It was the colour of a crystal that had been through something deliberate and come out clear.

That is a different move from any of the others. Blue and green never had anything forced on them. Red is the forcing. White is someone finding a bled crystal, recognising what was done to it, and choosing to undo it rather than inherit it. In the whole of canon there is exactly one confirmed white-blade wielder, which tells you how rare that specific act of repair is.

What the assessment is actually asking

Our Kyber Attunement sorts your answers to a set of ordinary-life questions into one of the seven blades. The result leans on temperament because that is what a questionnaire can see, but the thing underneath every blade description is the same question the lore is asking: when you have the upper hand over something that will not fight back, what do you do with it. Do you work with what is there, keep the door you were given, walk the line on purpose, force the outcome, or leave without needing it to have been evil.

Red is not the villain colour because the Sith are angrier than everyone else. It is the villain colour because it is the one made by refusing to listen. The Sorting of Arms runs the allegiance version of the same test across sixty-two houses: not what colour your will comes out, but whose side it lands on, and where you would stop following.