Someone else can speak to whether Styledrops is legit.
However, it seems that every store calls the bag colors different names from what Bal calls them. And Bal has three different names for each color: French, Italian and English. So figuring out which color the bag actually is can be hard. For example, Diabro calls a whole bunch of different bags "burgundy", while some are actually Grenat, etc.
Don't be discouraged...just know that you have to look at the color and compare it to the color swatches at ateliernaff.com to be sure of the color/year.