I just noticed this while right clicking a Figma file in the Projects grid list and having my Figma set to Light Mode: the context menu itself is still dark mode (and I normally am on dark mode, I just need to go to Light Mode for screenshots for a tutorial I'm putting together.)

I tried to see if it was just for the things in the Figma Home tab, and noticed that the context menus when right clicking the tabs do change to Light mode when Figma is in Light mode:

Just a visual bug. Figured I should log it somewhere