In the (relatively new) Star Trek movie Into Darkness, we see Dr. Bones and Captain Kirk in a world composed mainly of red plants. Obviously these are just eye candy with no real basis behind it, but I would like to go further.
What conditions would be necessary to have plants red in color? Blue?
Some factors I would imagine would be very important in deciding the color of my plants:
Sunlight — There a reason our plants here on Earth take most of the warm colors in more efficiently than green light. The color of our sun is yellow. Would having a green or blue sun impact the color the plants absorb?
Soil content — a shifted soil content might affect a plants color. A common example here on Earth is flamingos. Obviously not plants, but the way they change color upon eating large quantities of shrimp is a good example.
Any other ideas welcome to be addressed!