First time grower here and I am looking for some advice. I germinated all 5 of my seeds on a heating mat in the dark from July 4 to today July 8 and plan to transplant them later on into my 3 gallon pots. Question is I am starting to see a little purple and and I don’t know what this means. Also what distance and strength do the lights need to be at in this stage? Any feedback would be great!!!