Arcane Colors Mafia:
In this game, each player represents a mage - a user of powerful magics. The exact abilities each role has is determined by the moderator, interpreting two colors submitted by each player. Each color represents a specific field of magic, and both the individual colors chosen and the combination of them has some say in the role generated. The first color chosen, however, has a greater influence.
Kills are additionally flavored according to the color of magic used to create them, and the mafiakill bears one color possessed by its user. (The mafia have a 1-shot blasting wand which any mafia member can use to perform the mafiakill using any color, just to make it more difficult to deduce who performed the kill.)
The colors are:
Red: Red Magic wields the elements of fire, lightning, and explosion. It trends towards abilities that create destructive or harmful forces, and adds power and volatility to other magics.
Blue: Blue Magic wields the elements of water, ice, and crystal. It trends towards abilities that create protective or disruptive forces, and adds uncertainty and secondary effects to other magics.
Green: Green Magic wields the elements of wood, blood, and bone. It trends towards abilities that creative passive or reactive forces, and adds resilience and persistent effects to other magics.
Grey: Grey Magic wields the elements of sound, shadow, and soul. It trends towards abilities that tamper with or alter other magics, and adds controlled variation or growth to other magics.
Purple: Purple Magic wields the elements of symbolism, time, and fate. It trends towards abilities with vast but difficult-to-control effects, and adds chaos or absurd effects to other magics.
Pink: Pink magic wields the elements of psychic, illusion, and distortion. It trends towards abilities that uncover information or conceal it, and adds revelatory or manipulative effects to other magics.
May need some more work on the colors, I'd love to add one or two more, and make them more abstract and flexible. A color should be a vibe, not a measuring stick.
Of course, for a smaller game, the number of colors available may need to be reduced.