I can’t seem to find which theme this uses: http://rouge.jneen.net/v3.16.0/scala/, eg method names in blue, variable name in grey and so on.
The closest I found was
base16, which I got by using
rougify style base16, but it’s still too bare.
Incidentally I didn’t find anyplace where each of the themes (gotten from
rougify help style) could be previewed, instead I literally tried each of them one at a time.