Treatment for hair birthmark?

I'm a 14-year-old male and I have a birthmark in my hair, on the back of my head. I hate it since it's incredably embarrassing and very noticable. My hair is dark brown an my birthmark is bright blonde. I tried to dye it today for the first time, but it did not work properly for some reason. How can I get this removed? Are there any birthmark removal treatments for this?

Treatment for hair birthmark?
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