The fish shell is very cool.

My simple prompt (fish_prompt.fish)

function fish_prompt
    set -l t ffffff
    set -l b 660066
    set -l a ffff00
    set_color $t -b $b
    echo -n " "(basename $PWD)" "
    set_color $a -b normal
    echo "❯❯❯"
end

Install

sudo apt install fish

Switching to fish (default shell)

chsh -s /usr/bin/fish

Back to bash (default shell)

chsh -s /bin/bash