Press the OneDrive icon on your taskbar. Select the gear icon in the upper right corner. Choose one of the available options ...

You don’t need a third-party app, just the icon files to replace the defaults. If you’re theming your desktop, it won’t feel complete until the taskbar meshes with the rest of the look.

If you can identify the icon by name, delete it ... folder contents before confirming deletion to avoid losing important files. How do I delete files on my desktop that won’t delete?