I run Ubuntu on Windows. The prompt is too dark for me to see. Here is how to brighten the prompt.
Edit ~/.bashrc
Append the following line:
PS1='\e[37;1m\u@\h \e[35m\w/ \e[0m\$ '
\u = Username
\h = Hostname
\w = Working directory
So \u@\h: makes the prompt
<username>@<hostname>:
\e[ = Start a color scheme
The part that follows is a color: 37;1m
The 37 is the color.
The 1 says to use a bright version.
m somehow designates the end of the color sequence (but I'm not exactly sure of that part).
I made some more changes to make my life easier. I added some spaces to the prompt before and after the working directory so I could double-click the working directory path and get the path easily into my copy buffer.