What you described is more like highlighting the function signature in one color and the entire body in another. Syntax highlighting for the URL would be more l

What you described is more like highlighting the function signature in one color and the entire body in another. Syntax highlighting for the URL would be more like domain/subdomain in one color, emphasising query fields in one color and params in another, with colors potentially varying potentially based on their type/significance. That might help make the URL more readable but again doesn't really help if the relevant parts of the path/query string for trust isn't immediately apparent.