Rags have been my go-to confidence choice for more than 5 yrs. Like most other lures, I think the color depends on the conditions.
Red/cerise, white, and orange for colored water and yellow, chartreuse, and blue for clearer water seem to work best for me.

Best luck fishing for steelhead for me is roe and the rag soaked in shrimp scent.

I guess the thing I like best about them is the fish tend to hold it longer in their mouth which gives me a better chance of a hookup.