Looks ready or pretty close to ready, to me. The leaves are losing their color, which usually happens at the end of flowering. You might want to wait another week to see if it grows any more, but I like to let my plants flower until they have lost most of their leaves or color... the flavor and taste seems to develop the most in the very end of the plant's life. The difference between a bud at maximum potency VS a bud that has finished fully is negligible in potency. The degradation of the THC to CBN is so slight that you need a lab to detect the difference, so don't fall for the early harvest malarky... let your plants finish fully and you will be happy that you did.