12 day old seedling with purple stems?

I am currently growing Big Buddha Buddha Haze seeds that I bought from pick and mix seeds.. My seedling is 12 days old and I've noticed that the stems have turned purple, is this normal in this strain? Because I am quite worried as I haven't seen this occur on any other plants I have grown in the past. If it is a bad thing can somebody tell me how I can rectify the problem please?

Google will help most.
but in my experience (newbie here) purple in stems is a sign of low Nitrogen.
Bless,
DZ

most likely just genetics so I wouldn't worry, my plants have purple stems right now too and they're healthy. According to http://www.growweedeasy.com/marijuana-symptoms purple stems could mean phosphorous deficiency but your plant doesn't exhibit any other symptoms for that and looks fine so feel free to stop worrying.

Some strains will go purplish if temps are too low. What are your temps? Other strains, this is normal.

-spek

it looks a little light green are you watering it too much ?

@bryleetch I keep getting told it may be just genetics but I just cant stop worrying lol. I'll leave them for a week or so and see how they get on.
@spek9 My temperature varies between 26 - 29 Degrees Celsius, I've heard that is fine. Is that true?
@skunkd0c No I am not watering it to much mate, well at least I dont think I am. I water them once every 3 - 4 days, and then I'll obviously water them more frequently as they get older.

Thanks for all the comments