add custom color theme chooser Like this forum

have a look here

http://asprunner.com/forums/topic/24460-bootstrap-theme-selector/

Personally I offer an accent color for the user that he can change.

In my css all colors are variables and I can change the value of these variables via javascript.

https://davidwalsh.name/css-variables-javascript#:~:text=To%20set%20the%20value%20of%20a%20CSS%20variable,new%20value%20applied%20everywhere%20the%20variable%20is%20used.

You can buy Forum template and see how this functionality implemented there.

Hi mbintex1,
I've tried explaination from http://asprunner.com/forums/topic/24460-bootstrap-theme-selector/ and not work for 10.8 or 10.9 version