I wish the “Function coloring” meme died. It made sense in the context of the original blog post (which was about callback hell, hence the “4. Red functions are more painful to call” section un the original blog post), but doesn't make sense in the context of async/await. There's literally nothing special with async, it's just an effect among many others.

As soon as you start using function arguments instead of using a global variable, you are coloring your function in the exact same way. Yet I don't think anyone would make the case that we should stop using function arguments and use global variables instead…