Each vendor will have different color palettes from another vendor. I would visit a large quilt shop and take a look at the choices. Compare color to similar color. Red to red, blue to blue, for example. Kona Cotton will not exactly match a different vendor color palette, for example. It is a personal choice of what appeals to the buyer. The shop may have vendor specific color cards to look at. The “hand” ( the feel) of each vendor may differ. I find Kona to feel thinner than my fave vendor, Maywood.
BTW. Every mfgr has a solids line.