I have grown Auto Blackberry Kush by Dutch Passion and it was deep purple from leaf to bud. Looked amazing but I didn't really liked the taste (though my girl loved it, she smoked the whole plant :joy: )
hey man, basically color is difficult because for some strains like GSC it's like a question of temperature difference night and day. Try @fastbuds LSD 25 its a full red color that you don't need to worry with the night temp. or Hulboldt Seed Organisation Black D.O.G. is my favorite black estetics. Hope this helps, and good luck !