Markdown is the best. It's plain-text, meaning it can be version controlled. You can transform it to other formats with pandoc. It supports most common formatti

Markdown is the best. It's plain-text, meaning it can be version controlled. You can transform it to other formats with pandoc. It supports most common formatting options. I'm sorry, but "no color support" is not a compelling reason to switch to something more complicated. Define your own color meta-tag and generate a PDF from the markdown with colors if you care that much.