Plants look weird.. different colors of green/blue

Pictures from 3 different plants.. my plants are normally consistent in color and if not maybe a little bit lighter/darker. Now all of the plants with an exception of one look kinda blotchy.. any idea why that could be?

I’m growing in coco perlite, photoperiod, they are 10weeks from seed

You’re just seeing new lighter growth before it colours like the rest imo.

how frequently are you feeding with nutrients in coco?

what’s your EC in vs your EC out?