Encode $0 into color of hostname in PS1

bash_prompt.sh

# assumes 256 color support, do your normal case thing, etc
local green="\[\033[38;5;156m\]"  
local blue="\[\033[38;5;153m\]"  
local red="\[\033[38;5;009m\]"
local reset="\[\033[00m\]"

local git_stuff='$(__git_ps1 "\[\033[31m\]<\[\033[01m\]%s\[\033[22m\]>\[\033[00m\]")'
local status_color="\$(if [ \$? = 0 ]; then echo \"${green}\"; else echo \"${red}\"; fi )"

PS1="${status_color}\h${reset}:${blue}\w${git_stuff}${reset}$ "