Tiny colored prompt. I don't love it, but I've been using it for a while anyways. Best feature is that it is colorized based on the exit status of the previous command.

tiny_colored_bash_prompt.sh

#########################################
## Prompt stylization and history sync ##
#########################################

bash_prompt_command() {
    # Grab exit status of previous command
    RTN=$?
    prevCmd=$(prevCmd $RTN)

    # Save and reload the history after each command finishes
    history -a; history -c; history -r;
} # bash_prompt_command()

export PROMPT_COMMAND=bash_prompt_command

prevCmd () {
  if [ $1 == 0 ] ; then
      echo $GREEN
  else
      echo $RED
  fi
}

if [ $(tput colors) -gt 0 ] ; then
    RED=$(tput setaf 1)
    GREEN=$(tput setaf 2)
    RST=$(tput op)
fi

export PS1="\[\e[36m\]\u:\W\[\e[0m\]\[\$prevCmd\]>\[$RST\]"