I can't, for the life of me, figure out how to change grey highlight color in the screenshot below to something that will make the text a little more legible. Does anyone know what the "Display Item" name is that I need to change?

To get to the "theme editor" select Tools => Options => Environment => Fonts and Colors. I can't find what to edit.

I've also looked through Tools => Options => Text Editor => HTML => Formatting to no avail.

In case you are wondering the theme is a slightly modified Coding Instinct Theme