There's a number of issues worth noting regarding how we would see color on other worlds, some are contrary to the article, IMO.
Color constancy . This is the term used to describe how we adjust for color. Our brains adjust for the color based on what it decides to be the white source in the view. Cameras do best when there is a somewhat bright white object in the view, allowing it to determine better the other colors. Our mind works similarly.
If you look at a car's headlamp (tungsten) at night, it will appear to be white or yellowish white. But in the daytime, it will be distinctly yellow. The daylight changes how we perceive color, and the Sun is likely the best white light source ever. Perhaps evolution had a lot to do with this, but evolution is passive so other species see things differently, and often to their advantage if they are prey or predator.
Mars is under the white light of the Sun, but even more so since there is far less scattering. Any white object in a person's view will allow the observer to see the same color we would see if these objects were on Earth, IMO.
Another minor point is that the Martian's atmosphere is comprised of larger particles than our atmosphere. These particles happen to be just the right size to cause "selective scattering". Thus, red light is scattered more in the Martian atmosphere than blue light, opposite of what we have on Earth. When Viking landed on Mars, NASA gave the Martian sky a blue color, but later realized it's not blue but more of a caramel color. The sunset, for the same reason, presents a blue sky around the Sun since the red light is scattered more than the blue.
[Click image below to see a color-adjusted Rover image of a Martian sunset.]
Apparently GJ_3512 has 8 Oort Cloud objects centered at our Pluto orbit. It has a 2g super Earth that was with an inert gas core. The gases are there and different colours are faintly on their surfaces along w/ indigenous orange and yellow sulfur. The homeworld is grey-blue and hazy. Its albedo shouldn't be changed to -32C from -40C. I imagine there is a Callisto w/ 1000x the lunar ice deposits for making ecology, I'd guess a neon light would be affixed to a linear induction motor and dragged back and forth every 8 hours.