They say we should 'match the hatch'. The size and shape of your lure look perfect. I wonder what the colours of that dead fish were before stomach acid got to it. Also whether or not trout see different colours. That's something I've been wondering about for salt water fish lately too. I'm worried the white hull of my kayak looks to most fish I target as too much like the belly of a shark and it puts them off.

I think those smelt are generally quite silverish when alive. So would resemble the micro jig even more. I believe trout can see the different colours quite well. Sometimes a lure in one colour works and another gets completely ignored. Although at certain water depths certain colours completely disappear. I think red is the first one to fade and blue the last. I have been fishing with some trout egg imitations. Even different shades of orange can make a difference between getting a take or not. Interesting thought with the kayak hull. The kingfish never seemed to be much afraid of my green hull. From a distance, a white hull could be an advantage though as you're less visible against the sky.