My russian hamster is turning lighter

[ninaa]

Hi everyone! So my russian hamster's fur has been turning lighter since last week. I know it's normal for winter russian hamsters or hybrids to do that in winter, at least in the wild. But the thing is, she's turning lighter in spring to summer. Should I be worried? It can't be aging cause she's around 5 months old.

This is her two weeks ago:
1-4 — ImgBB

And this is her now:
1-1 — ImgBB
1-2 — ImgBB
1-3 — ImgBB

I'm sorry about the quality but she wouldn't stay still
Her head fur turned lighter and she has kinda white horizontal strips in her back as well.

[Ria P]

Don't worry some hamsters change colour. She is very cute.

One of mine changed from almost black to a very light grey.