This Question is migrate/modified from here: Can we add a different colored "Quote" box?
Sometimes answers get long and complicated. Those answers will often have blocks of text that are quotes, and blocks of texts that the main answer, and other blocks of texts that are side notes or interesting tidbits which the writer wishes to draw attention to.
It's common practice these days in tutorials, and other learning material to put different types of information in different colored blocks. Blue for information, red for warnings or gotchas, green for best practices etc.
I would like to propose that ~ or | (or anything else that makes more sense) be used at the beginning of a line to give an alternate color the the quote block which is set by > . This way different content can be emphasized in different contexts in the most easily comprehended formating. Though we have all made due with bold and italics and quote blocks for quite some time, I think all our sites, both questions and answers will be improved by an additional color format of the quote block.
An example of how it make text stand out as a different context.