To my eyes, I see a perfectly healthy plant, new growth will naturally be lighter colored than older growth. You only reaaallllyyy need to worry when you start to see them turning yellow.
Here’s a good pic of one of my poor babies that I had an issue with:
If you look at the top of the picture at those leaves, they have a good bit of yellow in them, which I don’t see in your plants. Also keep in mind I took these photos under natural light, and from what I can see you have your lights on when you took those pictures. When under different types of lights, your plant can appear to be a different color, when it’s actually just fine!
I had to leave for a few days and she grew too close to the light and suffered some heat burn. But once I moved the light away and got some better ventilation setup (I was working with a temporary grow space at the time) she was much better
Even after all the abuse she took I still got some good larger than hand sized buds and cola’s off her (this was Girl Scout Cookie btw) and what a good smoke they were
I guess my main point here is that you don’t need to be worried until you start to see her developing some bright yellow coloration. IF this were to happen to:
Older growth growth lower on the plant during Veg cycle): You need more nitrogen
Newer growth: It’s an Iron (Fe) issue. This is caused more by PH being out of whack causing nutrients to not be absorbed properly rather than an actual lack of iron.