PLEASE HELP !!!

This is one the 2 seedlings that have sprouted I’m not sure if the seedlings are purple because of genetics or deficiencies in calmag or something I have them in a spyder farmer grow tent with a sp 1000 running 18/6 on about 20% I gave a little water yesterday just seen this morning I also have them in cups with bag over them with humidifier running 65-75 What should I do please help any thing would be greatly appreciated
 

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Ok I just took the bags and what crazy is I went back to check it’s actually already starting to straighten up also should I still run my humidifier till veg ?
 
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