Persian pie

I see nobody directly answered your question- the key to color change is lowering your temperatures the last 2-3 weeks of flower.. especially that last 2 weeks I run my A/C full blast and get the daytime and nightime temps 10-15 degrees lower than normal. Also 11-13 light cycle also can be key in getting the unique phenotypical traits to express, like purple color. ANND dim your lights slightly in conjunction with the a/c and it will encourage that color change

The purple will come probably in a few more weeks. Around week 6 flower you should start to see purple👍

The purple will come probably in a few more weeks. Around week 6 flower you should start to see purple👍