MAGIK FEM

Your temperatures and humidity look spot on so I doubt they're the problem... I'm unclear as to the strain you're growing but as HerbalEdu said, it might just be the strain. Two things I would suggest you do... the first and most important is to check the pH of your runoff. If that is coming in at a reading between 6.0 and 6.5, you're probably ok and it's just the strain. If it's outside that reading, then you likely have some lockout going on and will need to do a good flush to get her into that range. You would need to go about half strength nutes when you start them up again after the flush. The second thing I would suggest is to knock back on your grow nutes as they tend to have far more nitrogen in them than plants like during flower... and if you DO find your runoff PH to be out of balance, this is the most likely culprit. Good luck! Your grow looks really good and I hope the color is just the strain!