I read a very enlightening article in fly fishing and tying about color and conditions..I think it's last months issue so look it up. Guy fishes what sounds like our OP and Or. and documented his flies color, outside conditions, condition of the fish etc. for the past 10+ years. Said the old adage, dark fly dark day really didn't mean diddly..In a nutshell said dark flies catch more fish..BUT they also catch the most stale fish..Bright flies caught more fresh fish, aggressive fish..Interesting in that at times of year he'll fish different colors...like won't fish dark in the spring so he's not hooking kelts etc. Of course water temps also comes into play and I'm not going to get into that , so look up the article if you want to learn more.. This was for WINTER steelhead, summers will take dries so you can figure that out on your own..