Style being overwritten

Hi- I’ve got a side menu on a project that has menu items with a white background until one item is selected then the style changes. The problem is the style is not changing. It’s being applied, I see that in the debugger and in chrome dev tools but not visually. In Chrome dev tools I see that something else has priority:

My style is called dashSideAcct and the other one must be system generated because it’s not one of mine. Is there something more to changing a style than just… changing a style?