Windows makes it easy (although not obvious) to customize the Taskbar with custom icons. You don’t need a third-party app, just the icon files to replace the defaults. If you’re theming your ...

You can set a dark or any icon of your choice – but the images have to me in the .ico format. Read: How to change File and Folder Icons. As an example, let us change the icon to a dark one.

Windows 10 makes it easy to make the icons in a folder larger or smaller. First of all, note that changing the icon size of files in a folder changes the size of all the icons in that folder.