Yes you can see the trichomes with the naked eye but it is almost impossible to tell their colour. My per5sonal preference id to get them when they are all cloudy white and just beginning to turn amber. I have a 30x jewellers loupe, and you need a steady hand. Its my intention to take tric pics tonight anyway so ill get back to you.
Get a loupe in the meantime on ebay for a couple of quid.