A lot of people's hair changes as they age (mine went from platinum blond when I was a baby to dirty blond now), so I would focus less on finding out what your hair color when you were young and finding out what it is now. I would think the best way to find out your natural color is to just let there be a little regrowth, and see what color your roots are.
2b, fine texture, normal porosity & elasticity (CG as of 12/2011)

Low-poo: UFD Rich & Funky
Cowash: VO5 Kiwi Lime
RO: Tresemme Naturals, Aubrey Organics GPB, Ion Effective Care, MillCreek Keratin
PT/DT: IAgirl's PT, GVP CB
LI: KCKT, Cure Care, CJ CCCC Lite
Styling: Curl Keeper, As I Am Jelly, UFD Curly Magic, CJ Curl Queen, TIGI Strong Hold Mousse


^^ day 1 of going CG; avatar = 6 months later