What Colors should tricombs be when i start to flush?

My plant is a 6-8 week flowering plant. First time harvest on it. Was wondering what color the trichombs be and how long will it take to flush them? I am watering every 4 days. Was thinking of just flushing last two times I water.

I go with amber/ cloudy.

Have a look at this:

https://www.rollitup.org/view.php?pg=faq&cmd=article&id=168

I start to flush on the first signs of amber trics. My first flush is 3x the size of the container...then 1.5 the size and so on for about 2 weeks.