Girlfriend dyed her hair, I do not like it. What should I do?

Anonymous
So my girlfriend has naturally dirty blonde hair, Well she died her hair brown and she looked really good with it brown. But now she dyed it blonde, like bure yellow/gold blonde and she has short hair as well and it makes her look...

I think she might of gotten the vibe that I didn't like it very much, but IDK. Should I say something to her about it, or just wait for her to dye it again?
Girlfriend dyed her hair, I do not like it. What should I do?
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