Yellowing leaves in late bloom?

This is my first grow and I’m probably in week 6-7 of the bloom cycle with 3 plants in an indoor tent. I fed them a day ago and upon checking them tonight, several leaves have suddenly turned yellow.

I’ve been using dakine 420 Base and Bloom every feeding (besides weekly flush) and added shock and awe bloom booster from week 3 through now. Also a small Co2 pop bottle dispenser(cheap).

I Didn’t know if this sudden change in color was a sign or what. I haven’t trimmed much at all besides the first week or two of flowering.
Thank you people

Hey mate your plants look ok for a first attempt ! the discolouration is nothing to worry about in fact its expected when you are this far into bloom and to be honest if you only have a week or two to go until they finish, you would be just as well to shift to just water.
as a general rule if you have a nutrient problem a quick foliar spray with some of your regular nutes will sort it out.
you got some pink stems which is a sign of stress and also you have some leaf clawing which is indicative of over watering.
i normally wick any excess water out of my pots by standing the pots on a clean towel but remove it when you feel its done its job.
The rest of the colour you have looks to be genetic expression so no worries there, have your night time temperatures dropped ? as that will also bring out any colours.

Gotcha I appreciate it, that’s what I figured being this close to the end. And not really they may fluctuate 7 to a high of 10 degree difference at night, I’ve tried keeping the heat under 70 and humidity under 45% during flower.
When I watered the 3 plants I used 2 gallons total with nutes, it just shocked me when I checked and a couple of the leaves have turned yellow completely in such a short amount of time being maybe 36 hours total.
I really appreciate your help bud

You are very welcome mate and if this is your first attempt I got to say you have done very well, my first attempt was a hermaphrodite tree of bag seed Kush that tasted like old rubber tires.

Haha thank you boss, yea first time. Don’t give me too much credit I had to get rid of one it got mildew on a little spot and chopped it quick. Thanks for the help my man!