Astrophile

Hey so I work in this designer community and some of them have their background (transparent part) as dark. Dark as in black and dark blue tiles (transparency tiles). I was wondering if there was any way to change the tile color to a darker one instead of just white and gray without paiting it or doing things with a pencil or brush but rather do it in pdn settings or windows settings. I have indows 11 and this is what I meant; Can anyone help me make my tiles look like that?