How to add color to Github's README.md file

Question

I have a README.md file for my project underscore-cli, a pretty sweet tool for hacking JSON and JS on the command-line.

I want to document the -

Answer 1

As of writing, Github Markdown renders color codes like `#ffffff` (note the backticks!) with a color preview. Just use a color code and surround it with backticks.

For example:

becomes