The answer is yes and no - some pigments actually look the same as the real ones ( deep blue green ) until you swatch it on skin. Be careful with the mattes - some of the new fake mattes are almost the same as real - and I mean that seriously. The fake Goldenaire, Bright Fuchsia,Grape pigments are damn close to real as well - TOO close if you ask me.... The reason I stopped buying colours off ebay is because of this - 1) some colours (like just mentioned) are pretty identical to real colours, the jars and boxes were not, BUT ~ 2) the fake Chartruese I got was in a box and jar that were IDENTICAL to real ones. It wont take the counterfeiters long to put the fake identical pigments into the fake identical jars and boxes and then no-one will be able to tell the difference.
The only colours I am currently buying off ebay are those rares not found anywhere else, and colours from persons of whom I know WHERE the items were sourced.