I think "simple shapes and a pared-down color palette" is actually a better descriptor than I used. Even though the palette drawn from in both styles is limited

I think "simple shapes and a pared-down color palette" is actually a better descriptor than I used. Even though the palette drawn from in both styles is limited I think there's still a heavy emphasis on color, if that makes any sense. I wouldn't describe either style as dull or muted, I think in this sense the "pared-down" palette refers to the lack of shading or gradients in many of these designs.