I pretty much agree with that. I usually wear “earth tone” clothing regardless of where I intend to fish, mostly because it’s what I own the most of, and secondly because I never know when I start out if I might decide to take a detour to a small, low stream.
I don’t think it matters on 90% of the water I end up fishing on, though.
I wear shirts and hats that are tan or sage green in color so I can blend in better with the background that the fish sees from under the water.
However, most of the drift boats I ride in tend to be white in color or at least have a lot of white on them. Some have a lot of bright to medium blue as well. All the bottoms of the boats are white.
So, who knows.
But, then I fish in the larger rivers of WA and western MT. When fishing small pocket waters I know that the more you blend in and the less movement the fish can see means you will spook them less.
For the small brookie streams I fish, color seems to matter, movement a biggie, one other thing is the direction of the sunlight… how its hitting the water, if its at the right angle I could be wearing anything and they won’t see me…
After fishing for wild trout on a lot of Western Montana and Idaho freestone streams and rivers, large and small, year round for nine years ( averaging around 130-135 days per year ), I think color of clothing is not important at all.
Dress comfortably for the conditions, minimize your movement and noise, do a good job in selecting and presenting flies, and enjoy yourself.
Dr. Bill Hanneman wrote a really good phamphlet on what fish see. A real eye opener - he,he, he.
It’s a lot more than you might think at least during the day through a still water boundry. Can’t find it anymore. Maybe someone else remembers it. I agree on the night stuff. You can almost sneak up withing a few yards of feeding browns at night.