Is it possible to do these 3 things below?

1.        Get an image from database and show it as a background image of a div
2.        Make the image position relative so that labels can be on the image while the image is the background and labels position will remain unchanged
3.        Make the image translucent i.e., increase its opacity, to make it slightly faint to see.

What I have below displays image in an asp image control. Can this same code be used to display image in background of a div tag and make the image opaque?

byte[] bytes = (byte[])dr["Logo"];
img11.ImageUrl = "data:image/jpeg;base64," + Convert.ToBase64String(bytes);