Without altering natural color but getting rid of gray hair... I have a real dark blonde to brunnette color hair... dont no what to buy without changing the color of my hair any suggestions would be very helpful...

I have a similar problem, with having mostly brown hair with natural blonde and red-ish highlights. If I want the grey that's coming in to not show, I'd have to dye it all one color.
The only thing I can say is find a color that is closest to what you have, and if your hair is multi-colored like mine, well, then you'd have to sacrifice that.

Or you can do what I did and just let the grey come in and not worry about it (btw I'm 22 and started going grey at 20, so letting the grey show at my age was not something I took lightly)