What do the colors mean?
blue: for links (the A tag)red: for tables (TABLE, TR and TD tags)
green: for the DIV tagviolet: for images (the IMG tag)
yellow: for forms (FORM, INPUT, TEXTAREA, SELECT and OPTION tags)
orange: for linebreaks and blockquotes (BR, P, and BLOCKQUOTE tags)
black: the HTML tag, the root node
grey: all other tags