diff --git a/.bash_profile b/.bash_profile
index a183746..d4057a9 100644
--- a/.bash_profile
+++ b/.bash_profile
@@ -42,7 +42,7 @@ hash ssh-add ssh-agent >/dev/null 2>&1 && {
       echo
       alias ssh='ssh-add -l >/dev/null 2>&1 && unalias ssh || { ssh-add && unalias ssh; }; ssh'
     else
-      echo -e '\033[1;31mProblem connecting to forwarded ssh-agent!\033[0m'
+      echo -e '$(tput setaf 1 || tput AF 1)Problem connecting to forwarded ssh-agent!$(tput op)'
       echo
     fi
   else
@@ -61,11 +61,11 @@ hash ssh-add ssh-agent >/dev/null 2>&1 && {
           echo
           alias ssh='ssh-add -l >/dev/null 2>&1 && unalias ssh || { ssh-add && unalias ssh; }; ssh'
         else
-          echo "Problem connecting to local ssh-agent!"
+          echo "$(tput setaf 1 || tput AF 1)Problem connecting to local ssh-agent!$(tput op)"
           echo
         fi
       else
-        echo "Failed to start local ssh-agent!"
+        echo "$(tput setaf 1 || tput AF 1)Failed to start local ssh-agent!$(tput op)"
         echo
       fi
     fi
diff --git a/.bashrc b/.bashrc
index 60ae0e7..81137c5 100644
--- a/.bashrc
+++ b/.bashrc
@@ -1,5 +1,5 @@
-# Make bash a little more pleasent.
-shopt -s cdspell checkhash checkjobs checkwinsize cmdhist dirspell histappend no_empty_cmd_completion
+# Make bash a little more pleasent - these are valid for all versions.
+shopt -s cdspell checkhash checkwinsize cmdhist histappend no_empty_cmd_completion
 
 # Exit the shell on a Ctl+D.
 IGNOREEOF=0
@@ -12,22 +12,44 @@ HISTSIZE=-1
 HISTTIMEFORMAT="%d/%m/%y %H:%M:%S  "
 history -r
 
-# Set the prompts.
-if (( ${BASH_VERSINFO[0]} >= 4 )); then
-  export PROMPT_DIRTRIM=2
-  if (( $(id -u) == 0 )); then
-    PS1="[\[\033[1;31m\]\u\[\033[0m\]@\h] \w ->"
-  else
-    PS1="[\u@\h] \w ->"
-  fi
+# Determine the colour of the username in the prompt.
+if (( $(id -u) == 0 )); then
+  _COLOUR=1	# Red
 else
-  if (( $(id -u) == 0 )); then
-    PS1="[\[\033[1;31m\]\u\[\033[0m\]@\h] \$(echo \"\${PWD/#\$HOME/~}\" | awk -F/ '{if (NF>3) {printf \".../\" \$(NF-1) \"/\" \$NF} else {printf \$0}}') ->"
-  else
-    PS1="[\u@\h] \$(echo \"\${PWD/#\$HOME/~}\" | awk -F/ '{if (NF>3) {printf \".../\" \$(NF-1) \"/\" \$NF} else {printf \$0}}') ->"
-  fi
+  _COLOUR=2	# Green
 fi
-PS4='+(\$?=$?) $BASH_SOURCE${FUNCNAME:+($FUNCNAME)}:$LINENO: '
+
+# Version specific set up.
+if (( ${BASH_VERSINFO[0]} >= 4 )); then
+  # Add to the shopts.
+  shopt -s checkjobs dirspell
+
+  # Set the prompts.
+  PROMPT_DIRTRIM=2
+  # No colour:
+  # PS1="[\u@\h] \w ->"
+  # Coloured username:
+  # PS1="[\[$(tput bold)$(tput setaf $_COLOUR)\]\u\[$(tput sgr0)\]@\h] \w ->"
+  # Coloured username + host:
+  # PS1="[\[$(tput bold)$(tput setaf $_COLOUR)\]\u\[$(tput sgr0)\]@\[$(tput bold)$(tput setaf 3)\]\h\[$(tput sgr0)\]] \w ->"
+  # Coloured username + host + directory:
+  PS1="[\[$(tput bold)$(tput setaf $_COLOUR)\]\u\[$(tput sgr0)\]@\[$(tput bold)$(tput setaf 3)\]\h\[$(tput sgr0)\]] \[$(tput bold)$(tput setaf 4)\]\w\[$(tput sgr0)\] ->"
+else
+  # Set the prompts.
+  # No colour:
+  # PS1="[\u@\h] \$(echo \"\${PWD/#\$HOME/~}\" | awk -F/ '{if (NF>3) {printf \".../\" \$(NF-1) \"/\" \$NF} else {printf \$0}}') ->"
+  # Coloured username:
+  # PS1="[\[$(tput bold)$(tput setaf $_COLOUR)\]\u\[$(tput sgr0)\]@\h] \$(echo \"\${PWD/#\$HOME/~}\" | awk -F/ '{if (NF>3) {printf \".../\" \$(NF-1) \"/\" \$NF} else {printf \$0}}') ->"
+  # Coloured username + host:
+  # PS1="[\[$(tput bold)$(tput setaf $_COLOUR)\]\u\[$(tput sgr0)\]@\[$(tput bold)$(tput setaf 3)\]\h\[$(tput sgr0)\]] \$(echo \"\${PWD/#\$HOME/~}\" | awk -F/ '{if (NF>3) {printf \".../\" \$(NF-1) \"/\" \$NF} else {printf \$0}}') ->"
+  # Coloured username + host + directory:
+  PS1="[\[$(tput bold)$(tput setaf $_COLOUR)\]\u\[$(tput sgr0)\]@\[$(tput bold)$(tput setaf 3)\]\h\[$(tput sgr0)\]] \[$(tput bold)$(tput setaf 4)\]\$(echo \"\${PWD/#\$HOME/~}\" | awk -F/ '{if (NF>3) {printf \".../\" \$(NF-1) \"/\" \$NF} else {printf \$0}}')\[$(tput sgr0)\] ->"
+fi
+unset _COLOUR
+
+# Set the debugger prompt.
+# PS4="+(\\\$? = \$?) \${BASH_SOURCE##*/}\${FUNCNAME:+(\$FUNCNAME)}:\$LINENO: "
+PS4="+(\[\e[33m\]\\\$? = \$?\[$(tput sgr0)\]) \[$(tput bold)$(tput setaf 4)\]\${BASH_SOURCE##*/}\[$(tput sgr0)\]\${FUNCNAME:+(\[$(tput bold)$(tput setaf 2)\]\$FUNCNAME\[$(tput sgr0)\])}:\[$(tput bold)$(tput setaf 1)\]\$LINENO\[$(tput sgr0)\]: "
 
 # Platform specific set up.
 _PLATFORM="$(uname -s)"