It's really less "magic" and more "stupid fake science", which is usually not my wheelhouse, but I've had fun with it so far! Anyways, here it is, tell me what you guys think!
The "Magic System" is basically a weird form of science in this setting, that all the technology is based on. Around 200 years ago, these magic crystals were discovered to have the ability to filter the energy inside of them to produce stuff depending on the color (Red = Fire, Yellow = Light), etc. These crystals are called "Chromine" and this energy is called "Chromatic Energy" By distilling raw Chromatic Energy, you can filter it between crystals to combine their effects (Red + Yellow = Lightning/Electricity), and laying out crystals in certain ways within a "circuit" can produce new, more complex effects (laying out multiple Red Chromine crystals in the right circuit pattern can produce ambient heat instead of actual fire).
The vague domains associated with each crystal are:
Red - Fire
Orange - Earth
Yellow - Light
Green - Life
Blue - Water
I want to have Purple Chromine that somehow lets you have like, radio and internet but I'm not sure what domain to give it. Additionally, Green Chromine also mostly creates or controls like, tissues. Stuff like disease prevention and immunization is mostly outside of its wheelhouse and normal medicine like vaccines still have to exist.
Additionally, raw Chromatic Energy has some interesting properties. Notably, sometimes it leaks out of impure crystals and, if not contained properly, can seep into the environment. If this happens enough times, the environment can warp, creating weird fantasy biomes, like a rainbow forest filled with giant crystals, or a city where it's always night and all the animals are bioluminescent.