Sorry for the delay! Here is a post I made about harvesting outside:
It's not so much that trichome color generally may not be as accurate outside as much as it is that
amber may not be the best gauge outside.
@Amy Gardner always told me that outside amber isn't like tent amber because of the impact of the sun on trichomes, and BeezLuiz discovered that harvesting based on the standard tent-based reading of amber left him with very low THC numbers and zero CBN.
Here are his tests results.
So we are harvesting later than we have in the past to see how that goes. I've taken to letting the plant tell me when it's done, including when the smell changes and it starts drinking much more slowly, in
addition to the number of cloudy/clear trichomes.