r Kepler-186f — one of the first potentially rocky planets found that might be the right temperature for liquid water — shows red plants.
HD 40307g, meanwhile, is many times more massive than Earth, which would mean that its gravity is much stronger.
Kepler-16b, the first planet confirmed to orbit two different stars, a bit like Tatooine. It's certainly way too cold for life — and might be a gas giant, rather than a rocky planet as pictured — but