How to edit color of widget title structure?

Hi @myrouble,

This is a conflict with your theme CSS style. Please put this CSS code in your theme Custom CSS code section or in style.css file. Save it delete all caches and do Ctrl+F5 on website front-end:

.wpdiscuz-widgets-content h3.widgettitle{color:#333333 !important;}

The #333333 is a color code (dark grey) you can change it to whatever you want.

https://www.w3schools.com/colors/colors_picker.asp

And how do I change the color of links as well as comments

These are not a simple text, these are links so they have link color. Use this code to change the text and link color in widgets:

.wpdiscuz-widget-comment-content .wpdiscuz-widget-comment-exc,
.wpdiscuz-widget-comment-content .wpdiscuz-widget-comment-exc a {color:#333333 !important;}