I'm working on an upcoming project which currently has the working title of "World of Colors". It takes place in a world populated by rainbow haired figures called "Arcus". They come in various types, such as red-types, blue-types, green-types, yellow-types, etc. These characters will be named after various shades of colors. The world they live in has a single Pangaea like continent, with 26 cities named after letters. Currently, the story follows 12 main characters and the upcoming events that will befall them.
Included in this world are monochromatic haired figures called "Erebus", which come in black-types, white-types and gray-types. (Sorry if those sound offensive, I don't mean them to.) They currently reside somewhere but their locations have been kept secret for countless years.
This work's backstory will have a similar backstory to the likes of RWBY and Undertale, in which there was a great war between the Arcus and Erebus in the past. After the Arcus won, the Erebus were sealed away somewhere, but we'll get to that later...
Additional info will be added later.