Lime green colour issues from beginning first time growing please help

There is nothing really to worry about, just follow the instructions on the bottles. If this plant has a high percentage of Sativa genetics, they can often have pale leaves naturally. At this early age I wouldn't be giving any cal/mag, the baby plant will not require more than what is in the nutrients you are giving her. Update, update! I just read your added info and it seems you are giving her "bloom/flowering" nutrients, which are lower in nitrogen than "grow" nutrients. This could also explain why the leaves look a bit pale green. You need to give her "grow" nutrients, and not the "bloom" nutrients. She should pick up once you give her the "grow" nutrients and you should see improvements with her colour 3-6 days after applying the correct "grow" nutrients. Hope this helps.... Organoman.