Ok, first and foremost...
It is IMPOSSIBLE to judge ripeness of buds with a naked eye. Anyone who is guessing is fooling themselves.
The ONLY way to know for sure where your buds are maturity wise is with a scope. Sure you can guess at it, but to know for certain, use a scope. You can get one for 12.99 at Radio Shack and take all the guessing out of it.
Hair colors dont matter, leaves dont matter, calyxes dont matter, receding doesnt matter, the only thing that matters is the maturity of your crystals. There is not a human alive who can see the condition of crystals with a naked eye. Not one, no matter how much they may claim they have telescopes for eyeballs.
THC is at the peak in cloudy crystals. You want to get the most possible cloudy crystals. That means the oldest crystals have passed their peak and are now degrading (turning amber/gold/brown). You will also have newly formed crystals clear and underdeveloped. So if you can get somewhere around 10% clear, 80% cloudy, 10% amber, you have nailed it.
Can't do that with an eyeball.