Colors of Magic

Red	Blood Hit Points	Animals	Life
Orange	Forge Gestures	Elemental	Making
Yellow	Illusions/Senses Spoken Word	Feelings	Unreality
Green	Alchemy Ingredients	Essence	Nature
Blue	Weather Sigils	Elemental	Battle
Purple	Reality Concentration	Truth True Names	Discipline Vow

from https://stuff.mit.edu/~boojum/CometWeb/Info/Magic/ritual.html

Magic Rules

You probably noticed the world has colored zones now.   The Rainbow River is gone, and each of the colored zones is a perpetual field of that magic color in which random magic occasionally happens (less often than on one of the river sides, but periodically).

The zone you were born in (your "color") changes how you interact with magic. You may never learn any spells of the opposed color. You may learn not just the base-version of your color's magic, but also the two other varieties that were present in the surges. You may learn one of the other four colors' base-version with no negative interference effects. You may not be a Rainbow Mage.

In a zone, spells of the opposed color only work if they are the base-version of that color, and even those are one difficulty harder, and if they have a duration it will drop significantly. Spells of a non-base-version of a non-opposed color are one difficulty harder.

If you were born on the "Rainbow Isles" in the Inland Sea (or on the open ocean or somewhere else weird and not in the colored zones), you get the old magic rules - one base-color, the opposed base-color is learnable by giving up dispels, learning non-opposed colors either burns out your skill or requires having a Rainbow Mage shtick/skill. There's no school teaching Rainbow Magic, but there are rumored to be a couple of self-taught Rainbow Mages in the Rainbow Isles. All spells work at their normal difficulty in those areas.

Spells cost 1 skill point. Skill in a full base-version of a color is breadth five 5, more limited base-version skills are narrower. Skill in a full non-base version of a color costs 3 (if you can buy it at all). If you have access to broader skills, you can get full-base+1 non-base for breadth 6 and full-base+both non-base for 7.

Spells that buff dice will be higher difficulty than they used to be.

Note that color is based on what zone you are born in, not what your parents were or where you grew up. For Elves that's "where you returned the last time you heard your song." Half-elves don't *normally* change color when they hear their song, but you might be able to argue me into it as a special case. If you don't start as a Mage, you can choose not to know what your actual color is. I might let you choose it later, or I might choose it for you.