These are the packages that would be merged, in order:

Calculating dependencies ... done!
Dependency resolution took 0.99 s (backtrack: 0/20).

[ebuild  N     ] x11-misc/util-macros-1.20.2::gentoo  82 KiB
[ebuild  N     ] x11-apps/rgb-1.1.1::gentoo  135 KiB

Total: 2 packages (2 new), Size of downloads: 217 KiB