plastikhaar colors?

any one familiar with their colors.their web site plastikhaar.com is showing the colors for their hair but it is so hard to tell.my hair is brunett with tons of caramel in it .in the sun it looks like red almost.i asked sara about the medium brown and she said it was a #9.(dinkel) and then she said a #5 then that would be mahogony.so any one with my hair color that would know with what color to go by?if its too hard to order through the website then i just might have to go to sallys beauty and pick up their euronext 18 inch extensions.i have heard good things about it.but i did want synthetic because it can hold a curl much longer.thank-you