Blue is a rare color in nature. If you think of one random organism, there's a high chance that the organism won't be blue. That's why some filmmakers use "blue-screens."
But what if there exists a world where all creatures are blue--where the flowers, trees, and birds are all shades of blue?
So, is it possible that all creatures (limited only to animals and plants) are blue? If so, how?
- All-blue, as in only all plants and animals are shades of blue. The environment (like the ground) doesn't have to be blue. There could be some gray here and there, but mostly shades of blue.
- No colorblindness solutions. This is because red-green colorblind vision would mostly see in black and white with occasional blue.
- I would prefer a scientific solution. So a world where all animals are blue or evolved to be blue because of a certain environmental factor (what is that environmental factor?).
- By world, I'm just meaning one life-sustainable planet.
- I'm asking if this is realistic, so no fantasy or magic.
- The world doesn't have to have Earth-like conditions. There could be different types of organisms than Earth and different environmental factors. There doesn't have to be intelligent species like humans.
- On Earth, basically everywhere you go, you see creatures (insects, plants, humans). The blue world should also be densely populated with creatures (it doesn't have to be as much as Earth, though).
- Biodiversity. There are an estimated 8.7 million species on Earth, and this blue world also should have a similar level of biodiversity.
- If blue isn't possible, another color would be okay.
- If blue plants aren't possible, only blue animals would be okay.
Basically, a world filled with only these types of creatures