My desktop icons open on a black background, which I find annoying. How to get rid of the black and make the icons open on a transparent background?

My desktop background is sky blue, so why are the icons opening on black?

Can you kindly suggest an easy and straightforward method to solve this problem, please?

I am on Windows 10 and my PC is a laptop ACER model.

Thank you beforehand for your help and patience with a retired civil servant.

Joe