One of my plants has this strange coloration while others do not.
Everything is same among the three pots including planter size, soil and watering
Possibly an iron or magnesium deficiency.
I'm not sure if that first pic is a deficiency, maybe, the other plant isn't too green either. A few white spots on the second plant too. Here's a deficiency chart I like
I found this chart for chlorotic (yellowing) leaves and thought it might be helpful. It's for aquaponics but I think it'll be good. http://odlaiskola.se/Diagnostics.pdf