Is it possible to make a Guake terminal to use 256 colors instead of 8?
The only information I found on the Internet is the message https://bbs.archlinux.org/viewtopic.php?id=173707 , but that did not work.
Guake supports 256 colors. And this answer to your question;)
For testing, you can simply run this script.
Well fixed: you just need to run these scripts listed here:
https://github.com/coolwanglu/guake-colors-solarized