Hello SpaceMod, your girl is looking great.
The purple color is probably the works of the colder tempratures, looking amazing.
I would recommend you look at the trichomes until at least 90% is cloudy.
Do NOT let your trichomes get amber, it will degrade the flavor of your weed, give you a more narcotic effect and it will give you a harsh feeling left in your throat.
Hope this was an helpfull answer my friend, Keep ong growing. Peace 👍