Very easy to hit the first case in Windows Explorer (sidebar is rendered using HTML), you will find many more as you keep looking. Still, the capability to cust

Very easy to hit the first case in Windows Explorer (sidebar is rendered using HTML), you will find many more as you keep looking. Still, the capability to customise the color theme completely disappeared from mainstream desktop OS's, and even today's dark mode is still full of corner cases (usually at the platform boundaries: the web, Electron, foreign toolkits, etc).