Ok basically what has happened, thanks mostly to internet, people have taken something kind of general and tried to turn it into some kind of rule...
In your basic 8wk flowering 100% indica, your hairs will SOMETIMES be around 80% red/brown around the time that your trichomes are peaking.
Keep in mind, this in no way applies to every strain available. So to use that as your guide is only going to cause you a problem at some point in the future.
I will point out once again.. I have a Sour Cream that will be cut tomorrow that is around 15% amber and NOT ONE RED/BROWN HAIR on the entire plant. Every single hair is white. NOT ONE RED/BROWN hair....
So if I were to take advise from people who don't really know, in about 6 months from now, I would still be sitting around waiting on my hairs to turn colors.
Fortunately for me, I have grown so many strains that I know that the brown/red hair shit is nothing but bullshit, so I check my trichomes.
My Caribe that is now 11 1/2 weeks in flower has been solid red for atleast the past 3 weeks, SOLID RED, yet at this point I am about 70% clear and around 30% cloudy. A few weeks from finishing regardless of what color "hairs" it has.