Dynamically populated scss values or how to change styles by user choice

When building websites I use scss to write my stylesheet and gulp to put it together into style.css

I know there is a way to dynamically populate the values in css using style.php instead.Is there a way to dynamically populate my stylesheet with user choices (let's say user can chose background of the section, text color etc) and pass these values to my stylesheet to avoid make my php template files messy with inline styles (which for now is my solution to dynamically populate these values).

Thank you!