How to change font color in simple messenger?

I need to change color in simple messenger as it is gray on white background and users are complaining they struggle to read it, but I don't really know where/how to change it. Can anyone help please?

Go to modules/boonex/simple_messenger/templates/base/css/simple_messenger.css

And edit the #B2B2B2 color to which color you want.Edit this color in message section,date section etc.

Go to admin panel ---->Clear Cache ---> All

Done!!!