She actually looks too dark to be a splash to me with that dark head so she well could be a lavender. But I'm not an expert on that color so I would defer to more professional opinions.
Since lavender isn't an APA color they're not well established as a color and it looks like she's just got a...
I agree with the others that she could well be an Ameraucana. Maybe a little ratty, maybe not well bred, but very possibly still an Ameraucana.
I would also say she's a she. I'd expect to see more obvious roostering if she was a rooster by this age.