How to differentiate command from the output using color

I have to differentiate command from the output using color

like this

$ cat file-name (this should be in some color say like red)
some test in file OUTPUT (this output should be in some other color say like green) 

so that I can easy differentiate command from its output in case of commands with large output

And i have to make it it work for every command that is typed on terminal if possible even command not found can be printed out in different color

Solution 1:

Add this to your ~/.bashrc:

        RED="\[\033[0;31m\]"
     YELLOW="\[\033[1;33m\]"
      GREEN="\[\033[0;32m\]"
       BLUE="\[\033[1;34m\]"
  LIGHT_RED="\[\033[1;31m\]"
LIGHT_GREEN="\[\033[1;32m\]"
       CYAN="\[\033[0;36m\]"
 LIGHT_CYAN="\[\033[1;36m\]"
      WHITE="\[\033[1;37m\]"
 LIGHT_GRAY="\[\033[0;37m\]"
 COLOR_NONE="\[\e[0m\]"

PS1="$PS1${LIGHT_RED}"
trap '[[ -t 1 ]] && tput sgr0' DEBUG

The colour code variables aren't necessary, but they simplify things. Change the LIGHT_RED to other colours to suit your need. Effect:

You'll have to source the .bashrc for changes to take effect:

. .bashrc

^{_{The LIGHT_RED isn't really light red for me because of the colour profile I have set for the terminal.}}

Sources:

1. How do I stop a bash shell PS1 color to stop at the end of the command?
2. Bash command prompt with virtualenv and git branch (for the colours)