Genicula, my little Acanthoscurria geniculata, molted 8 days before this picture was taken. (I haven't gotten a good measurement yet, but he is at least 2".) Those adult colors are starting to come in nicely!
This photo was taken five days before molting. Genicula, my 1.75" Acanthoscurria geniculata sling, had started to turn dark, and he didn't even try to tag the tongs or the water dish when I was doing maintenance. (He last molted 54 days before those photo was taken.)