Is this purple color normal?

Okay, I'm not a pro at this growing thing just yet but this just don't look normal to me. Should the petioles be this purple color or should they be green? Is there anything I can do to fix this or is this just something that happens?

I am no expert but I have an opinion. LOL. The only thing I know it could be is if there is a huge temp diff between the photo period. If you have a huge diff in temp with lights on and lights off then the limbs will turn purple. Now there could be other things that cause purple limbs but I dont know it.

What are ur min/max temps?

What strain u growing?

stressed out, they are. give us all the info................

Looks like some are purple and some are green. You should research sink leaves and source leaves......

Max temp is about 80 but when the light is off it can get as low as 65. My average room temp stays about 75 with light on an a/c. The strain in question is a purple elephant. This is my first time using roots organic coco fiber mix normally I grow in a dwc setup but wanted to try something new. I use cutting edge solutions 3 part mix (micro/grow/bloom) and just started adding advanced nutrients big bud. The ph before watering plants is about 5.0-6.0 when checking the run off its about 6.0-6.5