I invented a fantasy world which primarily consists of 7 Realms, six based on the six colors of the rainbow (the consensus is that indigo isn't really a color), red yellow green blue orange violet, with a 'Realm of the Light' in the center.
Each morning, the inhabitants of the six outer Realms raise their colored crystals to the sun, the rays of the sun bend and shine towards the center, where the Citadel of the Light is located. There is a prism atop the Citadel, it combines the colored rays into a shaft of pure light that extends to an even higher world, a world that is not discussed much in my novel.
The purpose of this Light is to provide hope, joy, and optimism to Mankind, back on Earth.
Now, the Colors must remain in balance for the Light to form, if one Color were to dominate and overpower the rest, the Light will fail to emanate from the Prism, mankind will become depressed, and they will stop making art and wearing colors.
Every time a human chooses a color, to paint their house, to paint their car, to tattoo themselves, or to wear an item of clothing, the corresponding Realm in the Color Realms expands physically and its ruler gains more power.
The first book deals with a conflict between the King of the Realm of Blue and the King of the Realm of Green. In short, Blue wants to destroy the rainforests on Earth, causing the oceans to rise, and the entire world will be painted in Blue. Whereas Green will use all the water to grow new forests and spread green over the lands.
A human male and female are transported from Earth to the Color Realms to become Champions of the Light and unite the Realms of Blue and Green once more, in peace and harmony. They are part of an ultimately larger group of 14 young characters from 14 different countries and cultures who unite as a force for peace and healing.
The Philosophies of the Rulers of the Realms: So far, I've decided that none of the Kings and Queens are truly evil.
Vallidius Blue wants to cover the Earth in ocean. But this will cause a revolution of our entire ecosystem. Sure it will probably take millions of years, but we've been through this before, at one time everything was covered in ocean and then land rose into what we walk on today. He believes that the environment is so damaged that the only way forward now is a complete transformation of the whole system. Sure, the humans will likely die, but he doesn't care about them at all. He's looking big picture, at the Earth and life on Earth as a whole. When there is only blue ocean the Light won't form, and Vallidius is okay with that.
Red is fiery, seeks renewal & regeneration through flame, like a forest fire.
Yellow is nurturing like the sun, but too much of a good thing scorches everything!
Yionaffe Green prefers forests and greenery, even at the expense of water.
Violet and Orange: I am less clear about these; they are "in progress". Orange might be ferocious like a tiger, perhaps? Violet is perhaps an alien color?
The Citadel of Light: unaddressed as of yet.
The Fatal Flaw I believe there is a major flaw in all this, as follows: if the Colors need to be in equal balance, I'm afraid that the Light can not be formed when Red, Violet, and Orange are so underrepresented both in nature and in fashion.
As a reality check: Does this world seem consistent or make internal sense?