Turn colon of prompt into writable indicator

.bashrc

@@ -56,10 +56,50 @@ if [ -n "$force_color_prompt" ]; then
     fi
 fi
 
+##########################
+### Colour Definitions ###
+#### ANSI color codes ####
+RS="\[\033[0m\]"    # reset
+HC="\[\033[1m\]"    # hicolor
+UL="\[\033[4m\]"    # underline
+INV="\[\033[7m\]"   # inverse background and foreground
+FBLK="\[\033[30m\]" # foreground black
+FRED="\[\033[31m\]" # foreground red
+FGRN="\[\033[32m\]" # foreground green
+FYEL="\[\033[33m\]" # foreground yellow
+FBLE="\[\033[34m\]" # foreground blue
+FMAG="\[\033[35m\]" # foreground magenta
+FCYN="\[\033[36m\]" # foreground cyan
+FWHT="\[\033[37m\]" # foreground white
+BBLK="\[\033[40m\]" # background black
+BRED="\[\033[41m\]" # background red
+BGRN="\[\033[42m\]" # background green
+BYEL="\[\033[43m\]" # background yellow
+BBLE="\[\033[44m\]" # background blue
+BMAG="\[\033[45m\]" # background magenta
+BCYN="\[\033[46m\]" # background cyan
+BWHT="\[\033[47m\]" # background white
+##########################
+
+prompt_colon()
+{
+	if [[ -w "$(pwd)" ]]; then
+		echo "\[\033[32m\]:\[\033[0m\]"
+	else
+		echo "\[\033[31m\]:\[\033[0m\]"
+	fi
+}
+
 # https://help.ubuntu.com/community/CustomizingBashPrompt
 # Was [01;32m;
 if [ "$color_prompt" = yes ]; then
-    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;33m\]\u@\H\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
+    #if [[ -w "$(pwd)" ]]; then
+    #    PROMPT_COLON=$(echo -e "\033[32m:\033[0m")
+    #else
+    #    PROMPT_COLON=$(echo -e "\033[31m:\033[0m")
+    #fi
+    
+	PS1="${debian_chroot:+($debian_chroot)}\[\033[01;33m\]\u@\H\[\033[00m\]$(prompt_colon)\[\033[01;34m\]\w\[\033[00m\]\$ "
 else
     PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
 fi