tan roots?

Hello all,
Doing my first dwc,I have 6 buckets at this time and all but 2 have bright white roots,the other 2 have a light tan/tan color.the plants are happy and look great and are about 3 1/2' tall.
should I be worried ? or not so much?
seems you read alot about keeping roots white....
Thanks for any advice.

The only thing I can think of is the water got low, thus highly concentrated and stained them. I don't know much about how that effects the plant growth. I would say as long as they're doing alright I wouldn't worry too much.

Here is my first grow in progress: https://www.rollitup.org/dwc-bubbleponics/329416-400w-dwc-grow-white-rhino.html

when i started clones they had white roots, then i started adding the newts and they turned a light brown, rosemen told me as long as the plants look good it could be the newts being absorbed by the plants. they went white a couple of days later.

i'm new to the hyro world too, i've read high water temps and organic nutes are the biggest culprits of brown root. i had brown root on my last grow and temps were high.