Obsidian is a Markdown note-taking app, not an app focused on colorful fonts (or page layout, etc). While you can do those things, they are not its focus or what most users are looking for, so you’re going to have to put in some extra work for something like this.
I try to avoid having HTML mixed in my notes unless necessary, but for sure, there are times that call for it or it would be useful. I often use the great wrap with shortcuts plugin for quick wrapping of text in whatever you want. 
Give it a try