Crimson is a serif font. It goes well with Roboto, Helvetica, Playfair Display and PT Sans. If you're thinking about using Crimson then try 160px for headers. Give 16px a shot for content.

People commonly tag it as design, fashion, business, education, ecommerce, shopping, classic and history. You can get it from Font Squirrel, Google Web Fonts, Open Font Library and Typekit.

In action

3 Crimson samples