When I was a child I had auburn hair (reddish brown.) My hair would get lighter and redder in Summer from the sun (kind of like lindsay lohan's natural hair colour.)
My hair lost most of its redness in my teens but you can still see a bit of red now. I can't spend my Summers outside all day like when I was a kid but if I could maybe that would bring out the those shades again.

Most of my family are brunettes or blondes so sometimes I wonder if I'm adopted!