The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
Stenacron interpunctatum interpunctatum do have more pics of her ????
Sometimes if the difference is dramatic it's even good to two-tone your flies with shellbacks or marking pens.
You know I went through a spell years back where I carried Gary Borgers little color booklet and kept notes as I went...Ok. There! I said it...Nerd!:)