Colorize and customize terminal prompt

suggest change

This is how the author sets their personal PS1 variable:

gitPS1(){
    gitps1=$(git branch 2>/dev/null | grep '*')
    gitps1="${gitps1:+ (${gitps1/#\* /})}"
    echo "$gitps1"
}
#Please use the below function if you are a mac user
gitPS1ForMac(){
    git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/ (\1)/'
}
timeNow(){
    echo "$(date +%r)"
}
if [ "$color_prompt" = yes ]; then
  if [ x$EUID = x0 ]; then
    PS1='\[\033[1;38m\][$(timeNow)]\[\033[00m\] \[\033[1;31m\]\u\[\033[00m\]\[\033[1;37m\]@\[\033[00m\]\[\033[1;33m\]\h\[\033[00m\] \[\033[1;34m\]\w\[\033[00m\]\[\033[1;36m\]$(gitPS1)\[\033[00m\] \[\033[1;31m\]:/#\[\033[00m\] '
  else
    PS1='\[\033[1;38m\][$(timeNow)]\[\033[00m\] \[\033[1;32m\]\u\[\033[00m\]\[\033[1;37m\]@\[\033[00m\]\[\033[1;33m\]\h\[\033[00m\] \[\033[1;34m\]\w\[\033[00m\]\[\033[1;36m\]$(gitPS1)\[\033[00m\] \[\033[1;32m\]:/$\[\033[00m\] '
  fi
else
    PS1='[$(timeNow)] \u@\h \w$(gitPS1) :/$ '
fi

And this is how my prompt looks like:

Color reference:

# Colors
txtblk='\e[0;30m' # Black - Regular
txtred='\e[0;31m' # Red
txtgrn='\e[0;32m' # Green
txtylw='\e[0;33m' # Yellow
txtblu='\e[0;34m' # Blue
txtpur='\e[0;35m' # Purple
txtcyn='\e[0;36m' # Cyan
txtwht='\e[0;37m' # White
bldblk='\e[1;30m' # Black - Bold
bldred='\e[1;31m' # Red
bldgrn='\e[1;32m' # Green
bldylw='\e[1;33m' # Yellow
bldblu='\e[1;34m' # Blue
bldpur='\e[1;35m' # Purple
bldcyn='\e[1;36m' # Cyan
bldwht='\e[1;37m' # White
unkblk='\e[4;30m' # Black - Underline
undred='\e[4;31m' # Red
undgrn='\e[4;32m' # Green
undylw='\e[4;33m' # Yellow
undblu='\e[4;34m' # Blue
undpur='\e[4;35m' # Purple
undcyn='\e[4;36m' # Cyan
undwht='\e[4;37m' # White
bakblk='\e[40m'   # Black - Background
bakred='\e[41m'   # Red
badgrn='\e[42m'   # Green
bakylw='\e[43m'   # Yellow
bakblu='\e[44m'   # Blue
bakpur='\e[45m'   # Purple
bakcyn='\e[46m'   # Cyan
bakwht='\e[47m'   # White
txtrst='\e[0m'    # Text Reset

Notes:

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