System settings typically control menu bar appearance. Solutions include changing the color in theme settings (if editable), applying a new theme, or tweaking an existing theme's code to change that specific color.
Double-check the pasted CSS. Check dev tools to see if it's properly applied. Try a different font family or font type, like sans-serif or monospace, to clearly distinguish it from the default font.
Otherwise, it works on my end. Maybe someone else can advise?
That's strange. My CSS affects note title text only within note list items. Your CSS also affects unrelated elements like other note list elements, the sidebar, the Options sidebar, buttons, etc.
Not sure what to say. I figured it out by bringing up the dev tools, manually changing the settings there until I got what I wanted, 'copied the differences' (an option under the right-click menu) and stuck it into the css file.
In any event, i think I can call this issue resolved. Thanks for your help @muzak !