Making next logical steps more prominent and using color to do so in a consistent way is a common practice. Google uses red (main actions), green (sharing) and blue (navigation) as
detailed in this talk. Bootstrap components (widely used all around the internet) use the same concept but
with a different set of colors and meanings. And we can find many more examples in existing UIs and design guidelines...
What I am wondering is which is the better way we can communicate this kind of design decisions to our community? Is it enough to communicate the rationale or more evidence will be needed? Is researching on specific UI components (as opposed to the broader interaction problems those solve when put together in a UI) the best area to invest our research and communication efforts?
Pau