Hm, I see. It's a tough call then.
Yet, I'm inclined to say she's a Brunette. Mainly because that's the direction her hair's taken.
However, it's undeniable that she was at one point blonde. But, I think it's a safe call, considering that's when Mario was in his Popeye days.
Ah, and you've nothing to apologize for. It was my bad for assuming incorrectly.