most hairs are a yellowy white.. hard to tell with the HPS lighting. But some hairs are turning like a reddy colour but that seems to be happening mainly on the immature little side buds :S and i'll test the crunchyness in a little while and report back
Edit: they don't seem very crunchy. not really sure what i'm looking for exactly though
Even before you flush plants leaves are starting to curl and get crunch. Don't be afraid to walk in there with a regular light while it's dark to examine them. It won't hurt them. 70%+ red hairs, leaves starting to look a little crunchy is a good sign that you are close to flushing.
If your leaves look super clean and grean plus just white or yellow hairs, you have a ways to go. When I see hairs pointing up like yours, that tells me they are a little young still. As the darken they curl a little.
There is a great Harvest tutorial in the Harvest section.