I'm a pikeminnow sports reward guy and I can give you some ideas of colors we use on the Columbia. Keep in mind these work well on both Smallies and Pikeminnow. Not well known but the better pikeminnow guys catch monster smallies every year.
The good pikeminnow fisherman are putting in 8-20 hours on the river a day and are fishing for $$$, so they are pretty serious about their lure color choices. These colors are for tubes, but of course work with senko's and worms etc.
Dark Smoke Hologram
Smoke Black Copper
Smoke with Green & Gold Glitter
Pumpkin with Black & Green Glitter
Brown Melon with Black & Purple Glitter
There is some matching the hatch going on with black robo worms (juvenile lamprey), and pink tubes like shrimp pepper with gold & black glitter (Siberian Prawns) which are a new invasive species mid-river. The walleyes seemed to really love those pink tubes! Also the new two tone colors with the white painted bellies did well.
I should also add that some shades of blue like daiquiri are catching on strong the past couple of years.
I have some personal favorite senko colors, but I will defer to Roger and some of the other experts on those.
At least this should give you something to think about! I would love it if you can give the Pikeminnow Sports Reward Program a try in 2015. I am very curious how someone proficient with large swim baits might do.