The legit ones I've eaten are very pale light blue, sometimes with brown specks but not always, like
this color. The ones I tested and turned up negative for MDxx are more of a flat powder blue, like
this color.
However, it's worth noting that I DO NOT believe that the fake G-ladies are pipes. I've talked to a few people who have taken them, and they have not experienced any of the standard pipe side effects. My guess is that there's some sort of RC stimulant in them (mephedrone, methylone, something like that), because even though they're clearly not MDxx, people do seem to enjoy them.
I grabbed some of the fake ones a while back and tested them, when the test came up negative I got back to my source to let him know. His response was to trade me an equal amount of molly for the fakes he originally sold me, because apparently a bunch of other people he'd offered them to were coming back eager for more, and the trade actually became profitable for him. I'm used to this source having the HIGHEST standards, he was extremely upset when I told him the test results and he also expressed a lot of surprise that they were popular despite being not actually containing MDxx, but I've spoken to at least one close friend of his who ate a couple and had a fine time ... not a real roll, he said, but certainly nothing unpleasant.
Personally I don't know what to make of it. Someone needs to send one of these in to ecstacydata, because if someone's come up with a "better fake" than pipes, people should know what it is. It's awesome that they're not 5-hour-panic-attack pills that keep you up for 2 days, but it'd be a lot better if they were just MDxx like they should be.