The cross-platform Lua wrapper of the console manipulation library rlutil seems to have arrived at a certain milestone:

https://github.com/d-led/lurlutil

The API has been expanded, converging on the original scope of rlutil.

Enjoy:

for i = 0 , 15 do
        lurlutil.setColor(i)
        io.write(i.." ")
end

and much more further console fun for Windows, Linux and MacOS X.