It's great when someone asks a question without providing any information about their grow. How bout some stats.....lights, nutrients, grow medium......you know the basics.
Gixxer and a vivosun 150 watt lights. And a few side lights. Using soil. Feeding fox farm tiger bloom and big bloom and cal-mag Stopped using the grow big once flower started. As recomended. Using half the amount recomended by them.
check your temps red as above is indicative of stalled sap due to a fan too close, same reason why apples even cabbage go red -- stalled sap due to cold good luck
Looks good to me. She's going to flip color on ya and become a pretty purple girl. Or at least her version of purple..lol. Prob some grand daddy purp in there somewhere.