Coloring a HH Ponytail

[CocoBunny]

Hi Ladies!

I bought a UPA http://laceflair.com/Hair Selections.htm. It says it's natural virgin texture. It's color 1 (blackest black) I need to dye it to a color 2 (dark brown).

Any suggestions on how to accomplish this or any brand of hair dye I should use?

Thanks in advance