for the right advice I'd need a few things- the structure youre fishing, water clarity, temp, what spwan if any is on of baitfish, and time of day or night you're gonna go.
I fished many places for walleye... literally world class places, like Dog and Esnagi lakes in canada, the french and pickerel rivers off Georgian Bay in Canada, as well as the bays de noc in the upper peninsula of michigan, lakes huron, st clair and Erie as well. Ive had nights where my brother and I filled a big white cooler with 7-9 pounders and nights where I got 30 of em between 17-25 inches and my boat partner using the same bait but a different jig style got skunked. Walleye are a lot of fun to catch but the technique is really really really more important than the color.
One thing to remember- and I also have to give props to arkansasriverblues for the jigging hints- walleye bite usually on the end of the drop, not the beginning of the jig action.... or a better way to say it is that they bite just before the trough of the jig, never on the crest.
4-12 inch jig action is plenty in colder clearer water. In cloudy murky or hot water you may be able to do 2-3 foot jigs with better success.
My go to jig is a gamakatsu 1/4oz stinger jig in a orange, black and green pattern from bass pro with a 2 1/2 inch mister twister white jig and a minnow on a 3" stinger treble hook. From there I will determine what needs to be changed replaced or discarded. If the alewifes are up and running, I switch to a blackback shad rap and cast every direction or troll around the dam or waterfall. As soon as twilight hits I switch to a blueback and continue.
If you have a narrows between the deeper holdout holes where the walleye suspend all day and dont likely feed, and a waterfall, river mouth, or place where fresh bait will be found after dark, fish the narrows from 7pm till twilight then bolt your butt over to the bait source feeder creeks or waterfalls or dam.
PM me if anyone has questions on this or specific conditions. I will do my best for recommendations.
Best of luck to ya.