Gentoo has a very nice trend of using color in all the portage tools. Except etc-update? It's very hard to see where the questions stops and the diff starts, etc. Reproducible: Always Steps to Reproduce:
I think colordiff would be a nice addition to a colored etc-update. Please consider to add this when you colorize etc-update.
If someone provides patches, it might be done faster. This is not something that will get done any time soon otherwise.