What color is ssj4 aura?

In Goku's first usage of this state, it is described as a "fully-powered Super Saiyan 4" and gained a red aura which occasionally flashes over his whole body.

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Why does Goku have aura?

Not Ultra Instinct itself. That's why Goku has an aura and a change in hair colour. Because he's using a form to forcefully acquire Ultra Instinct. Else if Goku knew it as a technique, he would be able to use it casually like Whiz did. What is Frieza's aura color? A member of Frieza race after Turning Golden When in use, they gain the golden/purple aura and sheen, their skin and jewel-like areas are recolored to purple, their eyes turn red, and their armor-like areas turn gold.

Who is Goku Omni God?

Goku is also stated to be the 'God of the Dragons' as the 'First Omni-King' was said to be the most powerful dragon in existence. It is stated by Shido that Goku can easily erase Erion and also his former and most powerful incarnation the Fallen by only in his base and Super Saiyan forms. And another question, are all saiyans white? Matter of fact, all Saiyans throughout the series look Asian, and really no other race at all. Consider, white people in the series are drawn with a certain look.

Can Saiyans be blonde?

Originally, the hair transformation from jet black to glowing blonde has been understood as a result of Goku reaching his Super Saiyan form but turns out the change has another more functional reason.