A script which switches background colour based on running process.
Put context in ~/.urxvt/ext
URxvt.context.names: sudo,ssh,python,gdb
URxvt.context.gdb.background: #114133
URxvt.context.python.background: #100157
URxvt.context.ssh.background : #300357
URxvt.context.sudo.background: #570000