There is (was?) an electric power provider in Germany by the name of Yellow. Their whole marketing was "electricity is yellow!"

It's true. Rules are meant to be broken - apart from when they aren't. You can change any aspect of the world any way you like, but _only_ if doing that is critical to your universe and story. Screwing up without reason conventions that are well established is a dick move, unless the whole point of your work is to mess with people.

Bright red barrel of aircraft grade fuel. Shoot it. Spawns a leak. **_FPS players mind's implode_**

Green means go.

Yellow means “Yello? I don’t got all day!”

And yellow means, uh, holy light, or something. I ain't played no Overwatch, but I all but guarantee that's what it is.

Electricity is yellow. Blue would be water.

what do you mean? electricity is *purple*

except the ones made from potatoes and cheese, those are just soup

Looking at you, "Dragon Age" Veilguard.

If you don't think soup is addicting, you haven't had soup.

Daggerfall!

How about this food is poison and snake bites heal?

Crackly blue is water? I'd even think ice before water.

I hate dragons. Controversial take but like just come up with some other mystical creatures! have some fun with it! if rather interact with a pink unicorn plushie than fight _another_ dragon

Similarly to how paprika chips come in blue bags and salted chips come in red bags. Anything else is heresy. Unless you live right across the border, where it's exactly the opposite.

My health potions are red, also, pulp free is not an option. >

Still heals HP. Definitely a health soup.

Blue-white lightning icons/symbols are quite common, I would think. Slay the Spire comes to mind:  Then again, there are some yellow ones, too: 

I used yellow for health to avoid red/green colourblind issues