It should change color now!!

[123fire]

Here you can see obito's original hair color it's black

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Then after being the juubi's jinchuuriki it turned white

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Finally here after being extracted from the juubi it's still white

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It should return the way it was black not white since he is not the juubi's power of the human sacrifice anymore!

 

[Rohan]

He partially used Rinne Tensei, thus it will always remain White.

 

[Goetia]

He used Rinne Tensei. That is what caused his hair to go white.

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[123fire]

He used Rinne Tensei. That is what caused his hair to go white.

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Oh so it's because he used rinne tensei??? But he's still alive it didn't have any effect on him

 

[Tobi98]

He still has some of the Juubi inside of him, that's why his hair is still white and he still has the Juubi's powers (the samething as Gaara after losing Shukaku)

 

[Anonn]

He used Rinne Tensei. That is what caused his hair to go white.

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This ^^^^^^

 

[Alfred Pennyworth]

I always the color changing thing is uzumaki specific...

 

[Rohan]

Oh so it's because he used rinne tensei??? But he's still alive it didn't have any effect on him

It's due to the strain of Chakra. In both cases of Nagato and Obito, their hair turned white due to strain of Chakra and It is perhaps permanent.

 

[Rinianne]

He used Rinne Tensei. That is what caused his hair to go white.

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But that was not the time he used rinne tensei. That was the time when he became the juubi jin

 

[Rinianne]

You can see, it's not about doing the rinne tensei. Obito's hair color changed when he became juubi jin. Madara, also had his hair color changed after he became a juubi jin.
when you become so6p, it just turns out that your hair color is affected, I think.
Look at Hagoromo

 

[Rinianne]

He partially used Rinne Tensei, thus it will always remain White.

he didn't. Look at the picture he gave us. That as the time the juubi was extracted from him. Look, still no black zetsu controlling him to use rinne tensei. if you become juubi jin, your hair color changes as well.

 

[Anime Fan]

he must be weakened