diff --git a/.bashrc b/.bashrc
index d281b7c..2ff1c63 100644
--- a/.bashrc
+++ b/.bashrc
@@ -111,17 +111,18 @@ __prompt_user_colour() {
   local RET="$?"
 
   if [[ "$LOGNAME" == "root" ]]; then
-    printf "%s" "1"	# Red
+    printf "%s" "1;31m"		# Bright Red.
   elif [[ "$LOGNAME" == "tadgy" ]]; then
-    printf "%s" "2"	# Green
+    printf "%s" "1;32m"		# Bright Green.
   else
-    printf "%s" "6"	# Cyan
+    printf "%s" "1;36m"		# Bright Cyan.
   fi
 
   return "$RET"
 }
 
 __nanorc_prompt_command() {
+  # Dynamically handle .nanorc file versions.
   hash nano >/dev/null 2>&1 && {
     # shellcheck disable=SC2155
     local NANO_VER="$(command nano --version | awk '/version/ { print $4 }' | cut -d. -f1)"
@@ -142,7 +143,7 @@ __nanorc_prompt_command() {
       else
         unalias nano
       fi
-      printf "\\033[1;31;40m%s\\033[0;39m\\n" "No .nanorc for version '$NANO_VER'." >&2
+      printf "\\033[1;31m%s\\033[39m\\n" "No .nanorc for version '$NANO_VER'." >&2
     fi
   }
 }
@@ -181,10 +182,10 @@ __read_ssh_agents() {
     exec {FD}<"$HOME/.ssh/agents" && flock -E 10 -e -w 0.5 "$FD"
     ERR=$?
     if (( ERR == 10 )); then
-      printf "\\033[1;31;40m%s\\033[0;39m\\n" "Failed to obtain lock on ~/.ssh/agents." >&2
+      printf "\\033[1;31m%s\\033[39m\\n" "Failed to obtain lock on ~/.ssh/agents." >&2
       return 1
     elif (( ERR > 0 )); then
-      printf "\\033[1;31;40m%s\\033[0;39m\\n" "Flock usage error." >&2
+      printf "\\033[1;31m%s\\033[39m\\n" "Flock usage error." >&2
       return 1
     fi
 
@@ -205,11 +206,11 @@ __read_ssh_agents() {
       fi
     done
     (( ERR != 0 )) && {
-      printf "\\033[1;31;40m%s\\033[0;39m\\n" "Failed to obtain lock on ~/.ssh/agents." >&2
+      printf "\\033[1;31m%s\\033[39m\\n" "Failed to obtain lock on ~/.ssh/agents." >&2
       return 1
     }
   else
-    printf "\\033[1;31;40m%s\\033[0;39m\\n" "File locking unsupported on '$PLATFORM'." >&2
+    printf "\\033[1;31m%s\\033[39m\\n" "File locking unsupported on '$PLATFORM'." >&2
     return 1
   fi
 
@@ -230,7 +231,7 @@ __read_ssh_agents() {
 
   # Error out if the data couldn't be read.
   (( ERR != 0 )) && {
-    printf "\\033[1;31;40m%s\\033[0;39m\\n" "Failed to read ssh-agent socket list." >&2
+    printf "\\033[1;31m%s\\033[39m\\n" "Failed to read ssh-agent socket list." >&2
     unset SSH_AUTH_SOCKS SSH_AGENTS_MTIME
     return 1
   }
@@ -268,10 +269,10 @@ __write_ssh_agents() {
     exec {FD}<"$HOME/.ssh/agents" && flock -E 10 -e -w 0.5 "$FD"
     ERR=$?
     if (( ERR == 10 )); then
-      printf "\\033[1;31;40m%s\\033[0;39m\\n" "Failed to obtain lock on ~/.ssh/agents." >&2
+      printf "\\033[1;31m%s\\033[39m\\n" "Failed to obtain lock on ~/.ssh/agents." >&2
       return 1
     elif (( ERR > 0 )); then
-      printf "\\033[1;31;40m%s\\033[0;39m\\n" "Flock usage error." >&2
+      printf "\\033[1;31m%s\\033[39m\\n" "Flock usage error." >&2
       return 1
     fi
   elif [[ "$(uname -s)" == "Darwin" ]]; then
@@ -291,11 +292,11 @@ __write_ssh_agents() {
       fi
     done
     (( ERR != 0 )) && {
-      printf "\\033[1;31;40m%s\\033[0;39m\\n" "Failed to obtain lock on ~/.ssh/agents." >&2
+      printf "\\033[1;31m%s\\033[39m\\n" "Failed to obtain lock on ~/.ssh/agents." >&2
       return 1
     }
   else
-    printf "\\033[1;31;40m%s\\033[0;39m\\n" "File locking unsupported on '$PLATFORM'." >&2
+    printf "\\033[1;31m%s\\033[39m\\n" "File locking unsupported on '$PLATFORM'." >&2
     return 1
   fi
 
@@ -312,7 +313,7 @@ __write_ssh_agents() {
     rm -f "$HOME/.ssh/agents" 2>/dev/null
   elif (( ERR >= 1 )); then
     rm -f "$HOME/.ssh/agents" 2>/dev/null
-    printf "\\033[1;31;40m%s\\033[0;39m\\n" "Failed to write ssh-agent socket list." >&2
+    printf "\\033[1;31m%s\\033[39m\\n" "Failed to write ssh-agent socket list." >&2
     return 1
   fi
   return 0
@@ -339,17 +340,17 @@ __ssh_agent_prompt_command() {
 
     # Find a new socket to use.
     if __find_ssh_agent_sock; then
-      printf "\\033[1;33;40m%s\\033[0;39m\\n" "Connected to existing ssh-agent socket."
+      printf "\\033[1;33m%s\\033[39m\\n" "Connected to existing ssh-agent socket."
       sleep 0.5
     else
       # Start a new agent.
       eval "$(ssh-agent -s 2>/dev/null | grep -v 'echo'; printf "%s" "ERR=${PIPESTATUS[0]}")"
       (( ERR > 0 )) && {
-        printf "\\033[1;31;40m%s\\033[0;39m\\n" "Failed to start new ssh-agent - continuing with no agent."
+        printf "\\033[1;31m%s\\033[39m\\n" "Failed to start new ssh-agent - continuing with no agent."
         sleep 0.5
         return 1
       }
-      printf "\\033[1;32;40m%s\\033[0;39m\\n" "Started new ssh-agent."
+      printf "\\033[1;32m%s\\033[39m\\n" "Started new ssh-agent."
       __write_ssh_agents
       sleep 0.5
     fi
@@ -400,17 +401,17 @@ if (( BASH_VERSINFO[0] >= 4 )); then
   # Trim the path in the prompt.
   PROMPT_DIRTRIM=2
   # Coloured username + host + directory:
-  PS1='[\[$(tput bold)$(tput setaf "$(__prompt_user_colour)")\]\u\[$(tput sgr0)\]@\[$(tput bold)$(tput setaf 3)\]\h\[$(tput sgr0)\]] \[$(tput bold)$(tput setaf 4)\]\w\[$(tput sgr0)\]$(__prompt_git_status "\[\\033[0;35;40m\] (%s)\[\\033[0;37;40m\]") ->'
+  PS1='[\[\033[$(__prompt_user_colour)\]\u\[\033[39m\]@\[\033[1;33m\]\h\[\033[39m\]] \[\033[1;34m\]\w\[\033[39m\]$(__prompt_git_status "\[\\033[1;35m\] (%s)\[\\033[39m\]") ->'
 else
   # Set the prompts.
   # Coloured username + host + directory:
   # shellcheck disable=SC2154
-  PS1='[\[$(tput bold)$(tput setaf "$(__prompt_user_colour)")\]\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}}'\'')\[$(tput sgr0)\]$(__prompt_git_status "\[\\033[0;35;40m\] (%s)\[\\033[0;37;40m\]") ->'
+  PS1='[\[\033[$(__prompt_user_colour)\]\u\[\033[39m\]@\[\033[1;33m\]\h\[\033[39m\]] \[\033[1;34m\]\$(printf \"%s\" \"\${PWD/#\$HOME/~}\" | awk -F/ '\''{if (NF>3) {printf \".../\" \$(NF-1) \"/\" \$NF} else {printf \$0}}'\'')\[\033[39m\]$(__prompt_git_status "\[\\033[1;35m\] (%s)\[\\033[39m\]") ->'
 fi
 
 # Set the debugger prompt.
 # shellcheck disable=SC2155
-export PS4="+(\[\e[1;33;40m\]\$?\[$(tput sgr0)\]) \[$(tput bold)$(tput setaf 4)\]\${BASH_SOURCE##*/}\[$(tput sgr0)\]\${FUNCNAME[0]:+(\[$(tput bold)$(tput setaf 2)\]\${FUNCNAME[0]}\[$(tput sgr0)\])}:\[$(tput bold)$(tput setaf 1)\]\$LINENO\[$(tput sgr0)\]: "
+export PS4='+(\[\033[1;33m\]$?\[\033[39m\]) \[\033[1;34m\]${BASH_SOURCE##*/}\[\033[39m\]${FUNCNAME[0]:+(\[\033[1;32m\]${FUNCNAME[0]}\[\033[39m\])}:\[\033[1;31m\]$LINENO\[\033[39m\]: '
 
 # Common aliases.
 hash bc >/dev/null 2>&1 && alias bc='bc -lq'
@@ -482,5 +483,5 @@ elif [[ "$PLATFORM" = "Darwin" ]]; then
   hash ls >/dev/null 2>&1 && alias ls='ls -bFG'
   hash top >/dev/null 2>&1 && alias top='top -o cpu -S'
 else
-  echo "${BASH_SOURCE##*/}: unsupported platform: $PLATFORM" >&2
+  printf "%s: %s\\n" "${BASH_SOURCE##*/}" "unsupported platform: $PLATFORM" >&2
 fi