What strains are purple as standard?

There's three strains that have turned out purple every time for me. FastBuds LSD-25 and Exotic Seed - Black Lemon Auto are dark purple or almost black, and Royal Queen Seeds - Watermelon Automatic a lighter purple. Absolutely love smoking all the 3 as well, they all have nice flavour and pleasant effects. If you're into Autos you might want to check out also RQS - Purple Queen or Sweet Seeds - Red Strawberry Banana (more of a mix colour of purple, green and gold). I have diaries of all if you want to check them out. Some other known purple Autos (that I've not yet grown) are Sweet Seeds - Black Cream Auto, Bloody Skunk Auto or Dark Devil Auto, FastBuds - Cherry Cola, Purple Lemonade and Blackberry.