Really, color depends on the water. If it's clearer water then go with natural colors like watermelons, green pumpkins, browns and smokes. Various colors of flakes work well depending on the forage in your waters too.
If water has low visibility use darker colors like black, black bkue, junebug, and even dark browns to get the best silhouette for those fish to find.
Me, I try to keep my colors as close to the colors of the crayfish I imitate with tubes as I can. I always keep my eyes peeled in the sunny shallows for one to immitate. In cold water here watermelon blue flake can't be beaten. And a green gold flake is awesome in the spawn.
Brand wise it's up to you. Just try to find a company that does hand dipped if you want the best action, and poured of you want the best durability. Personally, I like soft, supple tubes with lots of action. I'd recommend Cabin Creek, Dry Creek, Confidence Baits little tube, provider (on word of mouth) and howies tackle (similar to cabin creek).
Tube fishing a lot of fun and don't be scared to play around with a couple packs from various companies. They all should work well enough after all. Just find what you like and have confidence in and that's the best you can hope for.