You guys are dicks. Trout told Archie he caught a koke that's near the state record and you guys are ruining it.
Trout are salmon, btw, and I wonder if it was a coho hybrid or something that another &%$@ introduced into the Gorge.
I have caught many many rainbows with a blue back. Especially those that are in reservoirs or lakes, as opposed to a stream or river.
Even the guidebook states: "A rainbow trout is dark green to bluish on the back with silvery sides."
I have also caught hundreds of kokanee and none of them look even remotely close to the fish you caught.