>>1572872In my experience, brighter and transparent colors fare worse in darker water, whereas darker lures fare worse in clear water. Realistic patterns land somewhere between the two.
Keep in mind that fish can only really see the underside of a toad. 90% of topwater toads have a white bottom, and it will suffice for all but the murkiest of murky water. So I'd advise just picking a color you like or one that stands out well. It's fishing, this shit isn't a fine science.