How do you add a washout background (grayscale) to a webpage?
First of: Create your washout background (grayscale) if you have uploaded your webpage, you have to edited it or upload another file containing this:
be sure that use have uploaded the image on your web host, in an “assets” folder — If you haven’t uploaded your page yet, and you are still working in your local. Same code goes with it, except the upload part.