The purple is the result of anthocyanins, which usually appear with colder temps. Certain strains are more likely to present it than others. It’s not a problem.
uhhh my tent stays at 85-90 n ik thats not what i need but i cant cool it for sum reason
If you have at least a 10° difference between daytime and nighttime temps it will bring out the color if it’s got it in them. I love the purple ones myself and would be proud to have that one in my tent @lawman5657
ahhhh i always thought it was if they drop around 60 degrees but even the smaller plant? its jus not developed yet?
She is going to be a looker when she goes into flower!!! I’ve got a HVAC vent in my grow room with a 4 in duct running from it to my grow tent so I can achieve the 10 degree drop at night 
I’ve got the 10° different day/night but unfortunately I get not coloring other then green and white…
That sucks Gro Bro if color is what you’re wanting. You can also manipulate pH to bring the color out but I don’t think it’s a safe way of doing it.
Genotype+Environment=Phenotype
and if you’re getting the environment right you’re only stuck with the genotype part and that’s not your fault.
I am unable to adjust pH, I use Advanced Nutrients pH perfect. Lol guess I will just have to get it colder if I can.
Don’t feel bad, I got a 20 degree temp from light on to lights off. Never had one plant ever turn purple like that. Not at all for that matter