I learned that is theorized that a planet can be "superhabitable" if it has a size that is roughly twice that of Earth, the slightly higher gravity would mean a denser atmosphere with more rain and nutrients, the mantle would stay hot for longer and keep plate tectonics healthy for a long time, the plane would be "rounder" than Earth, with smaller peaks and valleys, and thus would be a sort of "puddles" planet, people would likely think of it more of an archipelago planet instead.
I also read this should affect the color of sun-powered life, but found no explanation for that, I assume it has to do with the denser atmosphere affecting what colors can penetrate on the planet, seemly such planets would tend to have more hydrogen than normal in the atmosphere, alongside with a lot more water vapor and rains.
So... can someone tell me what color the sun-powered life is supposed to have?
https://en.wikipedia.org/wiki/Superhabitable_planet
Note: differently from many questions, this is not about the star, this is about the atmosphere, it is a question about how the atmosphere of superhabitable planets, affect the optics and result in different forms of light to be available, regardless of the source.