There are times when bold, italic and blockquote just aren’t enough. I imagine WordPress would say, if you want a different appearance, choose a different theme
. These will change how a specific post looks, and will not affect the theme.
You can change some things, and add a lot of decoration, but why would you want to?
Add a decorated border to posts
Add a background image to a post
Change the background colour of the entire post
Changing Font Colour, Size, Typeface Of A Post
Decorating Paragraphs and Text
A good resource is w3school
also, Unicode Code Converter
Turn Left 2013 
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