How to get better color on an put door grow

[Firecanna]

Brand new to the group. Looking for tips on how to get better colors from buds. I grow outdoor in New England. Going on my 3rd year growing. Taste is there, potency is there, smell is great. Only problem is every strain comes out looking the same. Brownish green with orange hairs. Yea some are a little duller or a little more green. I usually wet trim, and age for atleast 2 months. Any tips?

 

[Jack og]

Color is based on temps during flower, if the genetics have the predisposition to have color, nite time temp drop by at least 20dgF will trigger the color changes