I have seen questions and answers posting output from latex that appear to blend in well with the site. In looking at the html/css underlying these posts, it appears that all that is required is to block quote the image and supply an image with a transparent background. When I produce a pdf and clip a portion of the screen, the resulting image has a white background and looks like this:
rather than, like this (using a transparent background image):
What is the best way to capture latex output for use in questions/answers and is it best practice to block quote it?