Width issue

Hi,

If I leave the menu on my site to have no background color, the menu button text covers the article text, which looks a total mess.

However, if I set the menu to have a white background, it covers the website’s edges/ grey background. Here is an example (please see the red arrows I drew): http://imgur.com/zc4gRzD

Is there a way to give the menu a white background as shown in the linked image, but prevent it from extending over the website’s grey edges/background?

Thank you 🙂

https://wordpress.org/plugins/mystickymenu/