[fuzzylogic]

“I’ve had the same color for the past three years...”, which implies it wasn’t like that prior to three years ago. So it is fake...unless three years ago her hair changed to that color (?)

[Oztrich Boy]

“I’ve had the same color for the past three years...”, which implies it wasn’t like that prior to three years ago

Or "T've been at this school three years, and they've only just noticed my hair"