Originally Posted by honeybadger
Sorry but this does not work for me - slackware 13.37. Got any more tricks that do not include recompiling the kernel.
As a matter of fact, yes
The path (in slackware) to rc.local is actually /etc/rc.d and not just /etc - have just entered the line in rc.local on my test build of slackware 13.37 64bit and text changes to green on reboot where it says "Welcome to Linux 184.108.40.206 (tty1)"
If you wanted green text in everything then you still need to edit colour configs in some apps as they will still display their native colour schemes.