Source

fabulous / docs / support.rst

Full commit

Terminal Support

Supported Terminals

Terminal default bright dim underline blink reverse hidden
xterm yes yes yes yes yes yes yes
linux yes yes yes bright yes yes no
rxvt yes yes no yes bright yes no
Windows [0] yes yes yes no no yes yes
PuTTY [1] yes yes no yes [2] yes no
Cygwin SSH [3] yes yes no [4] [4] [2] yes

Currently unsupported, but should support

Terminal default bright dim underline blink reverse hidden
dtterm yes yes yes yes reverse yes yes
teraterm yes reverse no yes rev/red yes no
aixterm kinda normal no yes no yes yes
Mac Terminal yes yes no yes yes yes yes

Unsupported and will not support

Windows Telnet
It thinks it supports ANSI control, but it's so horribly buggy its best to ignore it all together. (TERM = ansi)
[0]The default windows terminal, cmd.exe does not set the TERM variable, so detection is done by checking if the string 'win32' is in sys.platform. This This method has some limitations, particularly with remote terminal. But if you're allowing remote access to a Windows computer you probably have bigger problems.
[1]Putty has the TERM variable set to xterm by default
[2](1, 2) Makes background bright
[3]Cygwin's SSH support's ANSI, but the regular terminal does not, check for win32 first, then check for cygwin. That should give us the cases when cygwin is used through SSH or telnet or something. (TERM = cygwin)
[4](1, 2) Sets foreground color to cyan