I think they re fine. What type of soil and what kind of water are you using and do you pH the water?
Some strains just naturally shoe purple stems… not usually this young though… get back to me with your pH and water type.
@Hellraiser good advice. Your a good teacher. Always positive. 
these girls made it. Ph I see I very important when cloning. I almost lost them.
Promix seed starter ph 6.3