Not yet. /somefolder takes me to the Site root and no need for the .. here. Also if I see it right ../images being the root is at / (Site Root) you would be trying to get to tutsSCSS which has no images folder. Besides it should allow access above Site Root.
Something's off here. You did call out the images folder so did
background-image: url('pitch-s4b17d3ee2e.png'); work?
Second thought. If the images folder is used, then indeed you could use "../images"