Color-coded equations, also known as colorized equations, look like this:
I've tried to make a tool (faster than Kalid Azad's) for making these visuals.
I wrote about this recently and finally finished the tool in question! 🎊
This is what the tool used to look like:
This is what the tool looks like now:
I tend to finish projects in order to cross them off my to-do list, and they tend to stubbornly resist this to-do list crossing. I might finish this note-taking app but the current version seems to be eliciting random bugs.